Version 1.4.0 is getting an updated list of embed providers, so we should consider creating our own guide with a list of providers CP supports. I occasionally do have to look this up, I think others do too.
The original WordPress page:
ClassicPress core has a list in the relevant file:
Since both tables use WordPress versions, I was thinking of creating an updated table using ClassicPress versions. Versions prior 5 will be 1.0 and I think TikTik was the only one added after version 5. So that will be listed under version 1.4.0 once it is released.