This is a small part from Earth Final Conflict Season 5. The taealon is giving credit to humanity of how resilient we are. :) The taealon being is showing the actvas, how they will fail to destroy humanity and take back the planet.
Don't worry. it's not real but shows what could happen. Remember, not all Aliens are bad, or want to do what is shown, destroy us. :) Many benevolent aliens, beings in the universe.