Really missing the functionality the YouTube player provides in the new ad free player

I've developed a habit over the years of working out with you guys to use J (rewind 10 seconds), K (pause), and L (fast forward 10 seconds) throughout the videos if I either need a break or want to fast forward. Arrow keys also provided this functionality (left key rewind 5 seconds, right key fast forward 5 seconds).

I'm wondering if maybe we could get that functionality incorporated into the new player. Otherwise, I'm going to be sticking to the YouTube player for now.