- `ext`: The sequence will be replaced by the appropriate extension (like flv or mp4).
- `epoch`: The sequence will be replaced by the Unix epoch when creating the file.
- `autonumber`: The sequence will be replaced by a five-digit number that will be increased with each download, starting at zero.
- - `playlist`: The name or the id of the playlist that contains the video.
+ - `playlist`: The sequence will be replaced by the name or the id of the playlist that contains the video.
- `playlist_index`: The sequence will be replaced by the index of the video in the playlist padded with leading zeros according to the total length of the playlist.
- `format_id`: The sequence will be replaced by the format code specified by `--format`.