Hi there could really do with some help on this ID please. Working in the woods today and noticed a small circular patch of bark 5mm across moving along the log. On closer inspection I flipped it over to reveal what looked like a caddis larvae the circular patch of bark was actually some form of shell much like a caddis fly larvae but the insect was not enclosed with it more just attached to its back. The video shows the creature moving along and the photos show the insect on its back. Apologies for the photos the qualitys a little ropey.