Hey thanks very much for your input!
Believe it or not, I actually used both @openshot *and* #pexels for our last video (which can be seen here):
https://www.youtube.com/watch?v=mNyNhwmcaUQ
But I don't want to repeat myself, and the truth is: I'm no video artist or director, I'm first and foremost a musician, and I'd really love to find someone working with video who's interested in collaborating with me.
(and, as was to be excepted, the search is not going all that well…)