Do many people watch through embedded videos or do people watch in the YouTube app? There's a convenience in having all your videos in 1 place. I've had a couple podcasts move to Spotify only and I stopped listening even though I have a Spotify subscription.
- while building up your following on google, market your brand to your own site(s) as much as possible
- build brand an alternate streaming site(s)
- have a way to reach your followers in the event you get shut down - email list, etc. to inform your followers to switch to the alternate site