* ext Will be calculated from url if missing
* format A human-readable description of the format
("mp4 container with h264/opus").
- Calculated from the format_id, width, height
+ Calculated from the format_id, width, height.
and format_note fields if missing.
* format_id A short description of the format
("mp4_h264_opus" or "19")
("3D" or "DASH video")
* width Width of the video, if known
* height Height of the video, if known
+ webpage_url: The url to the video webpage, if given to youtube-dl it
+ should allow to get the same result again. (It will be set
+ by YoutubeDL if it's missing)
Unless mentioned otherwise, the fields should be Unicode strings.