Are you talking about the play-along type of thing, that is to say you playing bass over the original copyright work, or are you talking about complete and new cover versions recorded by you or your band? I've had a couple of the latter tagged with notification of possible claim, but no actual strikes.
I'm talking about the play along type of thing. I have no interest in monitizing it because I see that as a clear violation of copyright.
Here's an example of what I do for fun:
As some have mentioned (@DWBass @JRA) it's a good idea to claim fair use/education in the video. I could always try to come from a more pedagogical lens to cover any issues.
WORST case scenario, they take it down and I claim fair use and they say "no".
I'm just curious to see what people do. There are play along videos with millions of views and I wonder if those folks get special treatment... probably