ignore_no_formats_error: Ignore "No video formats" error. Usefull for
extracting metadata even if the video is not actually
available for download (experimental)
- format_sort: How to sort the video formats. see "Sorting Formats"
- for more details.
+ format_sort: A list of fields by which to sort the video formats.
+ See "Sorting Formats" for more details.
format_sort_force: Force the given format_sort. see "Sorting Formats"
for more details.
allow_multiple_video_streams: Allow multiple video streams to be merged