When users are playing videos on desktop, it would be great to have a keyboard shortcut to back up 10 seconds, like you can do with YouTube https://support.google.com/youtube/answer/7631406?hl=en. Please use the same shortcut (j), to make it seamless for users. YouTube also have a seek forward shortcut, which I've never used (not sure whether that's needed or not).

I use this back up feature constantly while watching YouTube videos to replay something I missed, but on videos hosted by Simplero, it requires the hunt and peck method to rewind a bit when you missed something. If I need to back up more than 10 seconds, I can simply hit the shortcut key multiple times, so the one 10 second shortcut has been enough for me.