I used to play with a group where, while we had 3 GMs (including me), they absolutely refused to play anything else except D&D (3.X at that time) during my game days and no one else wanted to GM games for us during my game days. The group didn't last long after the point where I suggested we play a Star Wars one-shot that night because I'd had a busy week and never finished prepping for D&D and I needed a break from D&D, even for one night. Half the group picked up their things and were about to walk out of the door rather than give me a one-night break from D&D*.
The hard part of finding videos on how to play a different game, though, is wading through bad presentation to find the good videos, and even then, you're not guaranteed to find someone who is going to present the information in a way that actually works for you (because despite what the decision makers in society believe, not every person learns the same way).
At least my group now will try just about any game as long as one of us has a copy of it. The biggest hurdle we have is that it's hard for me to learn most games by reading it and/or by trying to run it. And then, if we have a run of Real Life™ interfering, it makes learning a game and getting into it even MORE difficult. I've been trying to run a Star Trek Adventures game since October-ish and we've managed a whole 4 sessions in that time. Not only am I not retaining the system with all those gaps in playtime, I lost interest in the story I was trying to tell at the table, despite having had the bones of the campaign planned out since the first edition of STA was new. I guess that's the problem with running a group with just the bare minimum number of players we're comfortable having. Scheduling really is the Final Boss of TTRPGs.
* And before people dogpile me for not giving notice for not wanting to run D&D until after everyone showed up (as happened on a different thread here), I will point out this was in the late-1990s/early-2000s (pre-9/11), so instant mass communication wasn't as ubiquitous as it is now. I'm pretty sure some of us didn't even have cell phones.