If that big cloud hosting company decides they don't like your company anymore, and you've put all your eggs in that one basket - that's your fault.
There's ample evidence now that big tech companies are elephants that don't even notice the ants they're stepping on as they lumber around.
Built your entire company on AWS, or Google or Azure? You're a fool if you haven't built it to survive a cloud chucking you out.
Most unfortunately, there's no alternative platform for YouTubers. Hard to understand why no company has directly taken on YouTube - not Apple, not Netflix, not Amazon, not Microsoft - until there's an alternative platform, YouTubers just have to hope they don't stray in the way of the elephants foot.