Yes - they are effectively earphone sleeves. The issue is that for bass, they don't really deliver the goods. You need a good multi driver unit to get something worthwhile.
Yeah - this was the mix from the desk, so it is what it is. No multitrack to have fun with!
One thing I did learn is, next time (if I ever do anything like this again) is that I need to take a recorder to get some audience atmosphere.
I'll just keeping these for the two people that may (or may not) be interested.
(OK there was a bit of help with this one… the photographer at the gig happened to catch the footage from the audience POV)