Feature to show time remaining in a video.

[alanbjoseph]

Checklist

• [X] I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• [X] I have read the FAQ and my problem isn't listed.
• [X] I'm aware that this is a request for NewPipe itself and that requests for adding a new service need to be made at NewPipeExtractor.
• [X] I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• [X] This issue contains only one feature request.
• [X] I have read and understood the contribution guidelines.

Feature description

Introduce a feature to let the user know how much time is remaining, for the video currently playing.

An implementation example would be the VLC player. On tapping the 'end-time', it changes to 'time-remaining', running backwards. It reverts to 'end-time' when tapped again.

Why do you want this feature?

This would be extremely helpful for users watching long video streams and planning according to the time left.

Additional information

YouTube livestreams will not benefit from this feature.