It's not an easy answer, but the best way I've found so far is to use GrayJay.
If I find that one of the content creators I follow on YouTube happen to post their content on any other platform, I switch my subscription to that platform.
Besides YouTube they support Nebula, Twitch, Odysee, PeerTube, Dailymotion, Bitchute, Kick, BiliBili, Rumble, Patreon, and more.
It's not an easy answer, but the best way I've found so far is to use GrayJay.
If I find that one of the content creators I follow on YouTube happen to post their content on any other platform, I switch my subscription to that platform.
Besides YouTube they support Nebula, Twitch, Odysee, PeerTube, Dailymotion, Bitchute, Kick, BiliBili, Rumble, Patreon, and more.