Having it done with just pictures would be better than nothing. I think would be more realistic, is have several (at least 2 would help) people take a "photo history" of going to being at and then leaving the gathering. I could then make a out of that Ken Burn's documentary style with me narrating. Of course giving credit to all the photographers.
MP4 is the video format. Having a video of something similar as above would be helpful to. I could put it on my channel and comentary (with you , whoever you, might be) listed as the owner "Video By: Your Name Here"
Ideally i would like to have ALL the above, even if its only a little of it every week even if I AM there, and then I could talk you into sending to me and I could then have more "angles" to work with editing everything down , including my own video.