I was lucky to find https://purelymail.com/ which fit my budget and needs - primarily supporting multiple domains for my family and personal projects without extra costs.

I also just use KDE connect on windows to exchange needed files or clipboard. Devices need to be on same LAN or VPN during exchange. Pausing PC media during calls is a nice bonus.

For syncing photo gallery and Obsidian I use Syncthing.

If I understand it right… it will be much more costly to host videocentric platform than other types of content. A serious proposal for sharing the burden of hosting will likely be vital - through funding or decentralized storage/processing. Havent heard about that yet.