[Feature Request] "Add to Queue" Option

[onkoe]

I use YouTube often while doing long tasks. This is made easier by queueing videos I find in my subscription box letting it go untouched for some time. This is an incredibly useful feature for me and many others. I believe it can be implemented without touching the YouTube API (or NewPipeExtractor) by doing everything on the client-side. In case you were not aware of this feature, I have attached a screenshot below. Thanks for the wonderful project!