> You can publish to both and even better your own domain that simply points to your video hosting provider.

That one is likely the best use case while one monetizes on YT waiting for FreeTube to gain more popularity. Worth also for keeping a safer online accessible backup in case things go south with the YT channel being taken down for any reason, be it bogus copyright claims or else. What I'm not sure of though is how long until Google changes YT rules to disallow linking or even mentioning competing, or perceived as such, services. Companies always do that: I'm a Ebay user since 2008, 100% feedback both as seller and customer, hundreds of positives not a single negative or neutral in 18 years, but a while ago Ebay in their infinite wisdom blocked a listing of mine because I added the links of the documentation needed to use the device I was selling; no way to appeal successfully or have it restored, they evidently either used a monkey or AI to detect what they identified as an attempt to contact the customer outside of Ebay, for a €30 item nonetheless. Years ago they didn't enforce such idiotic limitations, so I wouldn't put any trust on YT to remain consistent with their current rules.