Welcome to /c/piracy
No netflix or streaming services landlubbers allowed, this is pirates territory.
Videos don’t contain malware because videos aren’t software.
It’s theoretically possible that a video will take advantage of a security flaw in a video player, including a browser video player, but I’m not aware of such cases having occurred. As long as you keep your software up to date, it’s probably not worth worrying about.
It's open source check for yourself
That's not what OP is asking.
The link is helpful, the “check for yourself” is not.
Clearly OP is in the beginner camp and just learn computer science and then a programming language is orders of magnitude harder than the yes/no responses they are expecting here.