youtube-player

⚬ PROBLEM:

Some content creators make videos where the aspect ratio changes during the video. When their video itself has a different aspect ratio than the monitor of the viewer, the "transparent background" option creates two differently colored bars, which is distracting in my opinion.

Example:
![Example](https://user-images.githubusercontent.com/41735601/114696189-b0747780-9d1c-11eb-9f

Hi,
When I'm using playlist download feature, It's downloading songs I already have downloaded, so with 200 song
playlist it takes a long time. I would like to see a feature that downloads only song not existing it the chosen directory.

Describe the bug
The pin feature, which keeps the toolbar always on the window, is not working. Even when it's pinned, it's going away.

Steps to reproduce
Steps to reproduce the behavior:

1. Open a window and set toolbar to Pin
2. take curser off window
3. toolbar disappears.

Expected behavior
The toolbar should stay pinned

Screenshots
![image](https://user-images.