For anyone in this position, don't forget !tipofmytongue@lemmy.world - maybe someone can help identify what you're after.
On the Other place, one of my favourite time killers was to go through the various subs devoted to identifying music/movies/books/etc based on small clips, screenshots or even just descriptions.
Don't think there are equivalents on Lemmy, but TipOfMyTongue can kind of serve that purpose :-)