Should be nice if you used same shortcuts as youtube:

j Seek backward 10 seconds in player.
l Seek forward 10 seconds in player.
. While the video is paused, skip to the next frame.
, While the video is paused, go back to the previous frame.

There are more but you can probably easy find and pick the ones you think are good. Its nice to have a standard so its easy to jump between youtube and xhamster.