I use Vinegar[1] with Safari on all platforms which provides HTML5 video (and PiP etc) but with the other YouTube features. I have the Subscriptions page bookmarked so I get a reverse chronological list from my favourite creators. You could also use channel RSS to do this without an account.
I also use Vinegar, it's great. I recommend the developer's other apps, too. They tend to be simple apps which do one useful thing well, and also have a sense of humour.
[1] https://apps.apple.com/app/id1591303229