Support YouTube video download

[meichengg]

Is your feature request related to a problem? Please describe. No it's not. I'm a Linux user, sometimes a Windows user too. I have used XDM (Linux) and IDM (Windows) which both support YouTube video download. I think it's very convenient feature to have in this awesome downloading tool. Definitely can replace IDM and XDM.

Describe the solution you'd like You can add a feature to the tool, when user paste youtube link, the tool will automatically get all the videos with other resolution, then show a list of those resolution as well as .mkv (for video) or .mp3 (for audio) and people can choose what they want and the tool will download it.

Describe alternatives you've considered None

Additional context Oh, if you can make a small download bar when a youtube link is loaded just like IDM and XDM, there's a small bar at the corner of the browser which also contains a list of videos for user to choose.

[IsaacHub]

@agalwood Why downloading YouTube videos not supported yet?

[TeamBattino]

Would really like to see this implemented!