Copenhagen '73 New audience tape
Uploaded to YouTube -
The upcoming LA 70 8mm by Eddie Vincent should be nice to see too.
The mic looks like the overhead drum mic.
It's 9/4 8mm footage and he has LA 71 film too. Footage looks like his photos: https://www.youtube.com/channel/UCzlagiZLp7bkxGCrPu8rXuQ/videos