I purchased these videos on DVD from UnderwaterOz, (Wendell Ozfovich) several years ago, and found them to be informative.
Recently, over the past six weeks, YTC - The New Fly Fisher - has uploaded them, I am assuming with UnderwaterOz’s permission. Maybe you will find them interesting too.
Original source, which has additional videos:
Both are about one hour in length
The Underwater World of Trout | How They See
Trout Vision & How They See Predators
This next one isn’t one of UnderwaterOz’s videos, but it is interesting and was uploaded yesterday. And it’s only about 2 minutes in length.