1947 Discovery of the Dead Sea Scrolls - 

The Book of Enoch is one of many ancient writings that depict the Nephilim and their deeds. Includes fallen angels, blood thirsty giants and a warning for all humanity. This book gives an alternative and fascinating description of humanity and the demise of man, filled with dreams and visions, a guided tour of heaven and hell by the angel Uriel. Book of Enoch named for the man that is said to have walked with God :

Genesis 5:21-24
 
And Enoch lived sixty and five years, and begat Methuselah: And Enoch walked with God after he begat Methuselah three hundred years, and begat sons and daughters: And all the days of Enoch were three hundred sixty and five years: And Enoch walked with God: and he was not; for God took him.

The Book of Enoch begins with a warning to all humanity; a divine judgment and sentence to be imposed. God tells Enoch that all life on earth will be destroyed by a violent flood. And, along with the Genesis narrative, God blames this evil on the "sons of God" - angels who lusted after the "daughters of men"

Unknown clip -
These angels referred to as "Watchers" - they keep constant watch,,, they decide one day, about 200 of them, that they are going to descend to the earth. They would like to, very much, make contact with the mortal women.
One of many, make that thousands, of articles concerning the Watchers. Too many to list and read at the present time, altho a study in and of itself - The Fallen Watchers - Grigori

The Book of Enoch is/was an expanded version of the story of the mysterious giants ("the sons of God") and the "daughters of the earth" spoken of in Genesis 6.

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There's this quick few verses at the beginning of the Flood Story about giants in the land, that come from the "sons of God" mixing with the "daughters of the earth". And you stop and think, "wait a minute, what's this all about?" It's like it went by to fast, and you want to grab it and say, "wait a minute , what was this?"
Enoch 7:1-4 
 
And all the others together with them took unto themselves wives, and each chose for himself one, and they began to go in unto them and to defile themselves with them, and they taught them charms and enchantments, and the cutting of roots, and made them acquainted with plants. And they became pregnant, and they bare great giants, whose height was three thousand ells: Who consumed all the acquisitions of men. And when men could no longer sustain them, the giants turned against them and devoured mankind.

Unknown clip -
That these angels have crossed over this boundary, that they shouldn't have - they were spiritual being and to remain as such. When they decided to descend upon earth, this unleashed upon the earth, all sorts of problems. Not only where these giants who are blood thirsty and violent, but also these angels went on to teach human kind a variety of forbidden crafts. Taught human beings how to make weapons of war.
Enoch 8:1-3
 
And Azâzêl taught men to make swords, and knives, and shields, and breastplates, and made known to them the metals 〈of the earth〉 and the art of working them, and bracelets, and ornaments, and the use of antimony, and the beautifying of the eyelids, and all kinds of costly stones, and all colouring tinctures. And there arose much godlessness, and they committed fornication, and they were led astray, and became corrupt in all their ways. Semjâzâ taught enchantments, and root-cuttings, Armârôs the resolving of enchantments, Barâqîjâl, (taught) astrology, Kôkabêl the constellations, Ezêqêêl the knowledge of the clouds, 〈Araqiêl the signs of the earth, Shamsiêl the signs of the sun〉, and Sariêl the course of the moon. And as men perished, they cried, and their cry went up to heaven ...

Dr. Stephen Breck Reid - Bethany Theological Seminary clip -
Now the good angels, the ones not tempted by these beautiful women, go to God, and say, "there is a lot of blood shed caused by these bad angels." At which point God says, "we need to bind Azazel" the, sort of, lead fallen angel.

To bind him, and then cast him into a pit. We might think of this as, how do we take care of nuclear waste in the 21st century? You take it out to a part of the world, where no one lives, and you bury it as deep as you can. For this community, the angel was like that sort of nuclear waste, dangerous,,,
Enoch 9
 
And then Michael, Uriel, Raphael, and Gabriel looked down from heaven and saw much blood being shed upon the earth, and all lawlessness being wrought upon the earth. And they said one to another: 'The earth made †without inhabitant cries the voice of their crying† up to the gates of heaven. And now to you, the holy ones of heaven, the souls of men make their suit, saying, "Bring our cause before the Most High.".' And they said to the Lord of the ages: 'Lord of lords, God of gods, King of kings, 〈and God of the ages〉, the throne of Thy glory (standeth) unto all the generations of the ages, and Thy name holy and glorious and blessed unto all the ages! Thou hast made all things, and power over all things hast Thou: and all things are naked and open in Thy sight, and Thou seest all things, and nothing can hide itself from Thee. Thou seest what Azâzêl hath done, who hath taught all unrighteousness on earth and revealed the eternal secrets which were (preserved) in heaven, which men were striving to learn: And Semjâzâ, to whom Thou hast given authority to bear rule over his associates. And they have gone to the daughters of men upon the earth, and have slept with the women, and have defiled themselves, and revealed to them all kinds of sins. And the women have borne giants, and the whole earth has thereby been filled with blood and unrighteousness. And now, behold, the souls of those who have died are crying and making their suit to the gates of heaven, and their lamentations have ascended: and cannot cease because of the lawless deeds which are wrought on the earth. And Thou knowest all things before they come to pass, and Thou seest these things and Thou dost suffer them, and Thou dost not say to us what we are to do to them in regard to these.'

Enoch 10:4-8 (and following) 

And again the Lord said to Raphael: 'Bind Azâzêl hand and foot, and cast him into the darkness: and make an opening in the desert, which is in Dûdâêl, and cast him therein. And place upon him rough and jagged rocks, and cover him with darkness, and let him abide there for ever, and cover his face that he may not see light. And on the day of the great judgement he shall be cast into the fire. And heal the earth which the angels have corrupted, and proclaim the healing of the earth, that they may heal the plague, and that all the children of men may not perish through all the secret things that the Watchers have disclosed and have taught their sons. And the whole earth has been corrupted through the works that were taught by Azâzêl: to him ascribe all sin.' 

Enoch tells us an expanded story of creation and the depravity of the watchers or fallen angels who created bastard children of gigantic stature, intense evil nature, prodigious strength and immense appetites. Upon devouring all of humankind's resources, they started to consume humans themselves. The Nephilim attacked and oppressed humans and where the cause of massive destruction on the earth.

Enoch 7:4-6
 
,,,the giants turned against them and devoured mankind. And they began to sin against birds, and beasts, and reptiles, and fish, and to devour one another's flesh, and drink the blood. Then the earth laid accusation against the lawless ones.

Enoch also wrote another book that is contain in the Dead Sea Scrolls called the Book of Giants. Although fragmented, it tells more about the corrupt nature of the Nephilim and how they created all kinds of monsters through the manipulation of the genes of animal and man. Enoch says that their imagination was their only limit.

1Q23 Frag. 1 + 6
 
[ . . . two hundred] donkeys, two hundred asses, two hundred . . . rams of the] flock, two hundred goats, two hundred [ . . . beast of the] field from every animal, from every [bird . . . ] [ . . . ] for miscegenation [ . . . ]

IMHO they key term in this passage and what Austin is referring to is "miscegenation" which,(,,,from the Latin miscere "to mix" + genus "kind") is the mixing of different racial groups through marriage, cohabitation, sexual relations, and procreation.

The term miscegenation has been used since the 19th century to refer to interracial marriage and interracial sex, and more generally to the process of racial admixture, which has taken place since ancient history. [http://en.wikipedia.org/wiki/Miscegenation]

Austin believes that Enoch is explaining the dinosaurs and bizarre skeletons found by archeologists. (What skeletons and what archeologists?) They are part of the abomination which provoked God to terminate all living creatures. Modern science is constantly endeavoring to classify remains within some Darwinian theory. It takes more faith to believe in science than the biblical story.

A very old, tried and true anti-evolution/anti-science rant. Altho Austin rejects what some would consider mainstream science, his apparent acceptance of "psuedo-science" and "psuedo-archeology" is obvious. He isn't taking into account as to how that would adversely effect premise.

He does state later in the video that he purposely did not include opposing views. Overall it does not take away from the video if one keeps that in mind as he is presenting the information from a Creationist standpoint.

Creationists without an understanding of the anti-diluvian world try to force a defensive explanation which fit their theories. It makes sense that dinosaurs are related to birds when you accept the idea that the Nephilim where cross breeding birds and animals.

All modern scientist agree that the dinosaurs were destroyed at the same time by some cataclysmic event. Couldn't this event be a global flood?

No mention of a global flood in this article -
 
The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaurs' food supply. However, in the 1980s, father-and-son scientists Luis (1911-88) and Walter Alvarez (1940-) discovered in the geological record a distinct layer of iridium--an element found in abundance only in space--that corresponds to the precise time the dinosaurs died. This suggests that a comet, asteroid or meteor impact event may have caused the extinction of the dinosaurs. In the 1990s, scientists located the massive Chicxulub Crater at the tip of Mexico's Yucatán Peninsula, which dates to the period in question. [http://www.history.com/topics/why-did-the-dinosaurs-die-out]

See also: The Top 10 Myths About Dinosaur Extinction: Misconceptions About the Extinction of Dinosaurs - We all know that the dinosaurs mysteriously (or not so mysteriously) vanished off the face of the earth about 65 million years ago, a mass extinction that still lingers in the popular imagination. How could creatures so huge, so fierce and so successful go down the drain virtually overnight, along with their close cousins, the pterosaurs and marine reptiles? The details are still being worked out by geologists and paleontologists, but in the meantime, here are 10 beliefs about dinosaur extinction that aren't quite true.

Some scientist say that the sea life found in the Himalayas and other major mountain ranges is due to the fact that they were once sea beds. Is it possible that the sea fossils where deposited by a global flood? God destroyed the world because everything was corrupt except for a few righteous people.

Uhm,,, no that would be called plate tectonics - The Himalayas are formed by the collision of the Indian and Eurasian landmasses which were originally separate. This collision uplifts the mountains, which is why they are still rising. From around 200 million years ago the area between the 2 separate land masses was covered by the Tethys Sea which was filling with sediments and had sea creatures which left fossils in the sedimentary rocks formed there. Around 70 million years ago the land masses collided and this started pushing up the seabed of the Tethys. Over the years a number of phases of uplift occurred with resulted in the mountain range we see today. Currently the Indian landmass is still moving north at about 2cm a year and the Himalayas are still rising at about half a cm a year.

So the Fossils found in the Himalayas are those formed in the ancient sea bed of the Tethys Sea, now exposed and pushed up to form mountains.

The science of today is again manipulating the gene pool under the guise of improving humanity. Are we back to creating monsters?

Have to agree with him here, genetic manipulation runs the risk of being used in "unethical" ways.

Both the DISC/SCI channels are featuring a program advertised as creating monsters, the premise is similar to the movie Jurassic Park. These scientist are serious about creating dinosaurs and ask the question - why not? Just like the movie the scientist are engineering ancient DNA and like the movie don't understand the implications.

Dinosaurs: Return to life follows scientist who are using the latest technology and advances in genetic research to revive the possibility of creating a living dinosaur. But in a different way than we ever imagined.

All of our technology has done nothing to change our morality. We can be very corrupt and arrogant people. The Bible narrative of sin has been the best explanation. It brings to light the dark nature hiding in all of us. Austin believes that the bible provides a way to over come.