Sadly, and I hate to say it, TikTok.
You can upload long-ish videos to it. Will the fine gentlebroccoli of TikTok watch? Well, that's for you to find out. But it is an alternative if you change up your presentation style and video length a bit.
There's also X.com, yes. Although run by one of the biggest idiots on God's green Earth you can upload shorter stuff to it just fine.
tl;dr due to economic pressures and attitudinal generational shifts long form content is fucked, and will be more and more fucked going forward. Change it up a bit or perish.