I may have misunderstood the list features, and may not be able to prevent generating the video links when a file is directly linked to… hmmm. Here is my concern: when I visit ActivityPub panel, FOSDEM 2019 I see a video box with a screencap/thumbnail for the video.
I don’t really know what data is going back and forth, what those other servers are learning about visitors to this site, etc.
It may be that as a public data store with a web interface, talkgroup/Discourse will always straddle the line concerning web safety. On the other hand, maybe a separate client would be useful, a user agent accessing the data in talkgroup via the API… 