Image lock : added pan around for videos

[GrosPoulet]

No description provided.

[GrosPoulet]

@EhsanKia i added pan around functionality for videos too.
It would be nice to add controls (play, pause,...) to videos, as in Imagus, i'll try to give it a shot since i did something similar when a video is opened in a separate window (W action key).

[EhsanKia]

I don't fully recall how it was on Imagus since it's been a while, but is it not as simple as settings controls=true on the <video> element? I usually do it manually by right clicking the (locked) video and checking "enable video controls" which does the same thing.