Some songs don't play
Like... at all, in the network inspector I can see that the song's stream got 403-ed
Like, any song by Mori Calliope.
The "videos" do play, but songs don't.
Thankfully in the videos section it only has songs, so it's a temporary solution.
Thanks for letting me know!!
Hopefully you don’t mind me asking, but what area in the world are you from? A name of a neighboring country or of your own country, if you’re comfortable in sharing, would be helpful in debugging.

Played a few videos as well as some from the Songs section, and the ones I clicked on worked fine. Playing from Search works as well for me.
The most probable cause is YouTubes “aggressive” geo-restrictions, but it’s still something I wanna look into just to ensure it’s not something I incorrectly configured.
PS. I read the comment you left in the other issue, will respond to that either later tonight or tomorrow once I figure out what details you may need ;)
I am from Greece, youtube music works fine with those songs for me, only your client fails.
Hey, I've got the exact same problem - only video playback works, nothing else. I'm from Czech Republic.
Thought I’d give a little update on what’s been going on concerning this. The issue is caused by YouTubes geo-restriction. I’ve been thinking of ways to solve this for a while now. The original reason I went with Cloudflare Workers was to circumvent this, which has worked to an extent.
Doing a proxy like Invidious does is the only way to fix this solution. But seeing as you can’t do that kind of proxy in the browser, it will be a challenge to implement properly. The code itself wouldn’t be hard, only thing that’s a challenge is finding the most efficient and cheapest way to host it since I don’t have that much of an income right now. Also finding a reliable implementation method (one better than Invidious’) would probably be manageable, albeit tedious.
I’ll keep looking into it, hopefully will figure it out soon. I’ll update you guys when I do.