Reset video to 0 time after completion

[neb-b]

The Issue

If you watch a video completely, then navigate away and back, it will be "stuck" at the end of the video. You have to manually move the time back to 0.

Steps to Reproduce

1. Watch a video until the end
2. Navigate away and back
3. See that it it tries to start at the very end

Expected Behavior

It resets to 0 after finishing

Tell us what should happen.
It doesn't

Suggested Solutions

There is now an onFileFinishCb function that is called when a file is done. We should set the time to 0 there.