This player from 2012
is working picture by picture.

When loading:
* use play-pause-reverse button for normal view
* handle window scroll bar to settle duration and direction
* turn mouse wheel for speedy view
* click on the progress bar to reach a snapshot

And the button on the left for full view.

A few info (in French) on Interfacteur blog
Gaëtan Langhade, Interfacteur