People really like to give feedback, or at least they like to be heard when they're interested. They lose interest quickly and it's not their fault, there's a lot of media to consume out there. I haven't released my first edit yet, so I can't speak to the "after" side, but while in progress I find I get a lot of feedback on images and clips, not a lot of feedback on plain text. Also the same people who express interest in something tend to return with reminders.
So maybe work with that, lean into it. Garner as much feedback as you can on the "before" end, get people invested in the process. Every time you post about your project, include an actionable request, even if it's as simple as "what do you all think?" or "does this work or does this NEED work?" the idea is that people are welcome to respond and you are looking for feedback rather than praise, and always include a visual aid, even if it's a still image though a video clip is great.
Speculating on release strategy, bear with me if these are bad ideas but again I'm not there yet;
1 perhaps out of sight, out of mind applies, maybe continue posting in your edit's thread after it's released to post relevant additional info about the release but also keep it in viewer's minds.
2 when responding to requests, politely make it clear that a review is important to you (even if the review is not positive), and make it easy for the requester to know how to do the thing you want (provide an ifdb link)