I definitely see some improvement. Was hard to see in the vid as the cameraman had the shakes
but it looked like he didn't dive his lead changes like the last vid and his last slide was definitely and improvement on the first two slides. One thing I did notice is when you are running your big circles you have a nice speed rate, transfer some of that speed over to your run downs to get him sliding, because he looks like he can slide if he 'wants' to. At home practice stopping him on his back end so he uses his butt and doesn't run through the slides like he did in the first two stops during that run, ie. Get him to halt rounded so it transfers to the slide - also if you need to pull him down into the slide then do it, because he knows his job and running through the slide is one of my pet peeves;) Trot circles, whoa, pick him up into 'frame' (I hate that word) rounded back and off your hands. He looks broke enough to just need a 'tuning up'
Keep at it, good job!!!
Ps. I couldn't really gain much from watching the 'spin' as it was just one turn!!