nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qghwaehxw309aex2mrp0yh8qunfd4skctnwv46z7qg6waehxw309aexjcn09ejh2tnwdaehgunfvyhxzurs9uqzp5daxvenwv7ucsglpm5f8vuts530cr0zylllgkwejpzvak0x2kqmehusjv has support for m3u playlists (custom NIP), but there is extremely few people making playlists. There is a good media player embedded into Nostria (I'm the developer), with media queue support, etc.
Discussion
I glanced at your media player and was impressed! I was talking about it on Monday night's vibe coding session. I love how you queue up content from kind1 videos too. It's something I'd eventually like to integrate into nostr.blue persistent player.