I've read through several threads on this and know that maybe I'll never find the culprit.
this is the noise
it's not constant. But happens when I ease off pressure pedaling and then start again. it does it when I'm standing up as well as sitting. It doesn't do it when I flip the bike over and pedal. Feel like/sounds like a click coming from either the freewheel (an old shimano, brass I think?) or the crank/bottom bracket. It almost like I can "feel" a little give with each click in the cranks. When I pull/push side to side away from the bike there's no play in the crank arms. My local bike shop did just adjust the rear derailleur and put new pedal cages on - it wasn't making the sound before. I don't think they would have touched the bottom bracket tho. Thanks in advance for any tips!
It weirdly comes and goes, but when it's active like in the video it's super annoying. But I spent 10 minutes trying to get the video - while it wasn't making the sound