If by "backup plan", you mean your videos being accessible, sure. But usually, when people talk about diversifying, they are talking about revenue. In this case

If by "backup plan", you mean your videos being accessible, sure. But usually, when people talk about diversifying, they are talking about revenue. In this case, PeerTube isn't really bringing revenue so I'm not sure it helps much. What would help is getting a Patreon or streaming on Twitch. Those are different sources of income, PeerTube isn't really unless you get hit like Blender did.