Not that it solves your problem, but it's useful to know the shortcut for speeding the video up and down: shift + , or . and use it in conjunction with the left

Not that it solves your problem, but it's useful to know the shortcut for speeding the video up and down: shift + , or . and use it in conjunction with the left and right arrows or j and l keys. It's the best you can do to skim clips.