But beyond that, I think vertical videos through Loops on the Fedi are likely to be far less obtrusive than they have been on other platforms.
What's so annoying about them on Instagram and YouTube is that the algorithm automatically drops vertical videos into my feed.
And there's lots of them in my feed, often on topics I'm not interested in.
They're not there because I'm interested, but because they serve the commercial interests of the social media app's owners.
Hashtags aside, on the Fedi, they'll only appear in your feed if you follow a Loops account you're interested in, or someone you follow finds one interesting enough to share.
And if people on your Mastodon server all find them really annoying, there's always the option to just block the Loops servers and be done with it.