As a user, I want to be able to download a single video.

[XiovV]

Acceptance criteria:

• The top bar in the Videos page should have the Download button which will open a dialog containing the form for downloading a video.
• Validate the input and display any potential errors
• User can download the same video multiple times

Download video form:

• Video URL
• Disable all of the inputs below
• Upon entering the Video URL, display a video card skeleton while the backend is fetching the video's information
• After receiving the video's information, display it instead of the skeleton
• After receiving the video's information, enable the inputs below
• Video checkbox (checked by default)
• Audio checkbox (checked by default)
• Format dropdown (Auto by default)
• Resolution dropdown (2160p be default)