Videos of different authors can be cut and published on youtube?

Question

YouTube

All sorts of cuts of other people's videos - quietly exist?
Or are they being struck?
By monetization, it is clear that it is turned off, but if the authors of the video from the cut are indicated, the video can be blocked?

Answer 1

You need to take permission. The cuts exist because the authors mostly give up on this matter. You can't follow everyone. Even monetization may not subside.
Do not care that you indicate someone somewhere.
Another thing is that it can be beneficial for authors. Meme druzhko, Big Russian Boss, NavElny, Red21, etc.

Answer 2

As far as I understand, there is something like a rule up to "10 seconds everything is possible"
But this is not accurate