Believe me, I've been there. The problem with any sort of tendinitis is that it takes forever to go away, and the slightest little mistake will bring it right back. Looking at your video, my only criticism is not one of grip width, but of stance width - your stance is about 2" too wide, and it's affecting your ability to get your knees out.
Your bar position looks OK from here, but trying to diagnose that in a video from waaaay over here, and at that viewing angle, is hard to do. What I tell all my trainees to do is to put the bar right on top of the scapular spine at its distal end and then roll the bar down until it just comes off, and then it's in the right place. Not sure if you'll be able to do this with your shoulders / traps.