Well actually it’s the hook Velcro for the muff I trimmed!
My actual muff is untrimmed, as nature intended.
This arrived from Amazon while we were travelling home from Crewe and our 7th cancelled balloon flight.
It’s an Opteka SteadyVid EX Video Stablizer System, a.k.a. A gimbal, which cost me £39. No power required, purely mechanical. It should help with stabilising walking videos. Lots of pro’s use similar things, though for £200+ you can buy smaller servo operated ones!