feature: adding shortcuts to captions , picture-in-picture and add auto options to video quality

[surya-moorthy]

Description:
I always wonder we can have shortcuts to make ourself easier just like watching a video in Youtube and the internet connection may be low or slower which can held to loading..

Solution:
I would like to add shortcuts to captions and picture-in-picture mode and I would like to add auto option for video quality and set it as default

[surya-moorthy]

I would like to work on this , please assign me for this