Greetings,
Sure, I do scroll through the YouTube AudioLibrary first, for hours. I've checked Macleod...used some at times. AI...not ready for prime time yet. But if you want folk, public domain, copyright free music, related to the country your show is about, it is very difficult to find. Finding ethnic music for India and Nepal that is really copyright free...and free, very hard. But my point is that when Facebook dings a song that is listed as copyright free, there does not seem to be any remedy to contest it. YT might have some way to do that. And many 'copyright free' sites require a monthly or annual subscription.
I just filed a protest for another song I tried to use that is from the NCS site ('No Copyright Sounds'). This audio file was dinged by Facebook. I sent the info to NCS about this ding and waiting to hear back. So that is the struggle to find the music that you can use. I do try to use copyright free music but it is not always obvious that it really is or is not.
Gary