used depends on the webpage
- comment_count (numeric): Number of comments on the video
- age_limit (numeric): Age restriction for the video (years)
+- is_live (boolean): Whether this video is a live stream or a
+ fixed-length video
+- start_time (numeric): Time in seconds where the reproduction should
+ start, as specified in the URL
+- end_time (numeric): Time in seconds where the reproduction should
+ end, as specified in the URL
- format (string): A human-readable description of the format
- format_id (string): Format code specified by --format
- format_note (string): Additional info about the format
with leading zeros according to the total length of the playlist
- playlist_id (string): Playlist identifier
- playlist_title (string): Playlist title
+- playlist_uploader (string): Full name of the playlist uploader
+- playlist_uploader_id (string): Nickname or id of the playlist
+ uploader
Available for the video that belongs to some logical chapter or section: