You can mitigate that issue to some extent by making the videos short. As long as the user count remains relatively small, the storage and bandwidth costs aren’t going to spiral out of control. Eventually you’ll have so many millions of active users that you’ll also need to figure out a way to get a steady source of revenue. I wonder how Loops will tackle that issues. Some mastodon instances already have a small yearly fee, so I guess video instances could do that as well.