Hello,

When playing a video, standard control bar gives few controls :

Can we add more controls, like :
next picture, or picture by picture
rewind
loop

Well, not a simple answer. What you embedded above is the native HTML5 video/audio control bar to play a file. That is like it is and looks a bit different depending on the browser and plattform used.

To extend this you need to use JavaScript. There are some mediaplayer plugins available: jPlayer is currently included and there is the half official mediaelementjs player available. They also include playlist functionality (if you mean this with next picture).

Those player provide their own interface. medialementjs is also a framework you can build your own player interface with (naturally JS coding knowledge required)

But rewind btw is not really a concept any player has ;-)

We can embed the vlc player.
Vlc has a rewind function, picture by picture button, and much more.

Of course, a visitor needs vlc to be installed.
But I'll only use it for special videos !

Of course, a visitor needs vlc to be installed.

Which makes this outside of Zenphoto's domain. You can install it on your computer but if you actually mean the actually Videolan server setup that is also outside of Zenphoto's domain.