closes #2234

Couldn't really reproduce this one, but looking at the code I can see that the progressbar only gets rendered when there's a reference to the video player (playerRef), and the error occurs inside a setTimeout, so it could be possible that for some reason that the player is no longer there when the timeout executes.

added scoped labels

I can't even upload a video to test to this environment because the settings for the max video size and max video length are set to zero.

Please, update the helm configuration for this review site so we can make sure the code doesn't break anything, at least.