YouTube is okay at this; TikTok is excellent at it. TikTok provides the fyp, community management, authoring and captioning tools, access to thousands of sound/music clips to use where they're handling the legal side, etc. Ostensibly this is very, very "creator-friendly", but only for a fairly specific niche of TikTok-like content, and only if you're not skirting the line of what they'll censor.
Vimeo has always felt to me more like a larger Vidyard— the content is 100% on you, but they'll handle the technical side as far as encoding and distributing, and give you a clean player widget you can embed on your own site.
That doesn't mean that a considerable amount of non-tech or low-tech (for certain definitions of low) people wouldn't rely on the actual tech expertise in terms of encodings, poster frames, subtitles, chapter marks, time-coded comments or similar things.
But if the "creator" in this scenario is khaby.lame or kallmekris, a service that helps them host their own videos on their own site is of zero use; those are social media personalities who take the hosting and technical side for granted— their primary need is exposure to a gigantic audience.
A bit like soundcloud for video.
Erm, aren't those exactly opposed?
"Drift along" as long as you are profitable is the definition of sustainable, no?
"Attracting too much audience" is anathema to sustainable if you can't maintain reliability or profitability in the face of the flood.
That's because they don't charge content creators; as it's a pay to play only platform, they make money from the individuals that subscribe to you. The amount you charge is up to you, though they only list the minimum once you have an account.