Generally your position is pretty good! Nice flat back. Someone has already mentioned jumping ahead. You stay over the middle of the saddle fairly well for having that habit though. Just remember that you don't throw your upper body down at your horse over the fence, you allow him to jump up to you. Nice low quiet hands but your elbows do tend to stick out a bit.
The biggest issue though is your leg. You have a nice long leg with your heel in a vertical line down from your hip. But you tend to ride with your toes out, particularly over the fences. To have a truly secure and functional leg you should have even contact on the INSIDE of your thigh, knee, and calf. By riding with your toe out you dig your heel into your horse and you lose contact with your knee. It's not constant though, just here and there.
Also (maybe I misunderstood) a rising canter is not a part of good eq, sitting is. In an eq class you will be expected to do a sitting canter and if called to on course, trotting usually means sitting as well (flat classes can call for both).
I've been to the flying cow!