Yes, and you can do the reverse by loooking at Asia.
If you think Everest and the rest of the world was covered by a flood five miles deep, then, now it isn't, where did the water go?
Ah - precisely, did he say that?
Pushed up from being under the sea by India moving north and crashing into Asia.
That's how all mountains are formed. Those that are still here haven't been eroded yet.
What is now the central USA also used to be under the sea.
What is now the Mediterranean Sea and English Channel and North Sea used not to be.
Land derived objects can be found under the water.
Did the video mention these things?
They raise questions that can be answered without resorting to superstition.
There may have been a flood somewhere - it certainly was not World-wide - but that has nothing to do with his hypothesis.
It actually wouldn't take that much
extra water to cover the Globe -
https://water.usgs.gov/edu/earthhowmuch.html
but it would still have had to come from somewhere and then go somewhere afterwards.
Did he tell us where?