These are the two mounts I use to mount action cameras to the outside of the three planes I currently rent (a Cessna 162 Skycatcher, a Cessna 172 Skyhawk and a Piper Warrior). Both mounts are designed to attach to the tiedowns. I’d like to get video from the tail but until I’m mounting stuff to my own plane I don’t really want to get any fancier than these. They’re easy to mount on the tiedown mounts so they’re very easy to put on and take off of a rental plane for each trip.
The fancier one with the blue bar is a MyPilotPro mount with a nice cinch down bar designed into it so you can simply run it through the tiedown, ballpark the tightness with the nut on one side, and cinch it down with the bar and you’re done. The other one is a DIY made from simple hardware from Home Depot. It takes some finger strength to cinch it down tight but it’s doable and only costs a few bucks to make. The video doesn’t show the furniture anti-skid pads stuck to the inside of the washers and trimmed to size so I’ve included a picture of that.