I'm not going to comment too much on the upper body since you said you had cracked ribs and that makes it hard to guess how you'd move normally, but I'd say for now work on your lower body movement.
1) Get those knees working
I noticed your knees were basically locked into that bent knee position the entire time. I'd recommend doing an exercise I call 'small and tall' to make turns easier, more dynamic and get you using your knees.
Basically you want to make yourself tall when you start a turn and small again when you're riding normally.
So you're basically lifting your body up and pushing off both feet suddenly just as you're about to turn, this will take the pressure off your snowboard as you start to turn your snowboard and as you come back down the pressure of your weight coming back down will help you power your turn more.
(I made a blog about it here if you need a diagram - 'Tall & Small' - How To Offload Pressure For More Snowboard Control When Turning
So you want to get into a rhythm of kind of bopping up, then back down every time you go to turn. You push up to lessen the pressure and lower weight on your snowboard, then come back down again after initiating the turn to power through the new change of direction.
2) Start being more dynamic with your upper body and knees (once your ribs heal)
Right now you're riding very passive, which could be due to the rib injury, but once that's better you want to try to power through those turns by really pushing your knees, hips and shoulders into the direction as you turn.
So instead of turning toeside then sitting and waiting for the board to turn around toeside, you want to turn toeside, then drive your knee, hips and shoulders toeside.
Really be active about getting your whole body pushing into the turn and that's the trick to go from letting your snowboard control your turns to being in control of your snowboard and being able to ride more tight lines like tree runs and black runs where tight, quick turns become important.
The rule of thumb when it comes to being dynamic with your body during those early stages is if you think you're doing a motion 90%, you're probably doing it 10-20%, so really get that body involved and push into those turns and you'll find your snowboard responds a lot better and faster.
Hope that helps, keep it up, you're doing great.