When I was like 12, I saw in some scifi thing in a museum someone had a virtual aquarium, which was just a tv screen with an animated wallpaper showing a little mosasaur swimming around doing mosasaur stuff. I went home and frantically searched for it online but it didnt actually exist.
Today I have searched for it again and it still inexplicably does not exist, in fact I found barely any aquarium wallpapers at all for wallpaper engine.

I literally just want an HD video of a small prehistoric creature frolicking in a tank, I can add it to wallpaper engine myself. Any prehistoric creatures are fine really, as long as the environment looks artificial, I want to look over and have it seem like I have a little animal in a tank on my desk.

I'm sure little videos like that exist, but google is not being helpful. If you know of anything please share, thanks.