Video time remaining

[faroligo]

[faroligo]

Display time remaining on the current video.

@meadsteve I will need the length of the video in addition to the offset to do this.

[meadsteve]

This might be a good one to do pairing with someone to help spread a bit of knowledge. So i'll leave it until the next meetup.

[faroligo]

@meadsteve Are you still holding onto this or is it free for development

[meadsteve]

@faroligo happy to free it up. You'll want to merge (or at least be mindful of) #110 first. As it touches a lot of the same code parts.