Hi and welcome!
I don't often comment on swings, but I was struck by your comment that you have had a back, hip, and knee issue.... and then I see how far you are able to get your club on the backswing. In between the 0:05 and 0:06 mark of your swing video, I can see your clubhead reach all the way to near the bottom aqua portion of the screen. You club goes WAAAAAAAAY past parallel, and I could swear it is seen near your hips. I can't see your hands at the top, but they appear pretty high, so the club could be at a 45 degree downward angle. Just seems to me that is a lot of club arc for a swing. I think you can get nearly as much power with a more compact swing, with perhaps a bit more control. But then again, you are the 2.2, and I'm up around 11. Take my observations with a grain of salt!
Edit: I just read that you do Long Drive Competitions!! Ah, now the big swing makes sense!!!