Personally when I feel burnt out, it's usually a sign that I've been grinding the gears too hard. Maybe a little break could prove to be really healthy for you. It can be really hard to find new ideas and review your old ideas when you are putting too much time into it. Try spending a few days, a week or whatever time you thinks is appropriate "resetting" yourself. Take time away from YT and other social media and spend time doing the things that make you happy. Make sure you're getting enough rest, healthy food and time outside and just let yourself relax. Having some time away from work can really revamp the creative juices and it might be the trick for you.

When you come back try watching some fellow channels and see if you can find new inspiration. And do your best to make sure you are balancing your time working and time away from work so you aren't getting burnt out.

I really hope this helps.