Does anyone have the original video (if it was public) this weird channel ripped it from? Pretty nice blonde in what looks like one of those Russian mud lakes.

https://www.youtube.com/watch?v=k9qLjO3kCwk

The videos and photos coming from:

https://www.istockphoto.com/sg/portfolio/oleksandr_trukachenko?assettype=film&sort=mostpopular
or
https://www.123rf.com/profile_tomasadzke

If you want the full size versions - it's not free. But you can found many nice preview video.