1. Add retry to extract video, and use proxy when retry if has proxy.

1. Add api subtitle-dl to stream download subtitle.

Set user requested lang to requested_subtitles

Fix no text but only \n in xml, eg: uwIHyLPBZkY.

Fix len(subtitle) due to subtitle may be None.

Return None if no text in xml, due to no subtitle and automatic_captions with gibberish except xml(xml format text part is empty) in this video https://youtu.be/LI0mzC6sl7w

Use web + ios.

Use player web + webpage.

Mark skip webpage due to missing some langes for some videos(l2P5PgL1LfI).

Skip webpage & add requested_subtitles back.

Mark subtitleslangs (requested_subtitles) for try speed up.

Use anderoid player, it faster than web.

1. Fix some video automatic_captions is empty (eg:VSFg5LZYsyc).

Fix missing some langs.

1. Set socket_timeout default 10 and set 20 when proxy.

Add proxy & update fetchSubtitleUrls.

Add chapters.

Add support download subType xml.

Add return duration if no subtitle.

Add duration(seconds).

Add noplaylist param for avoid download all playlist.

Set writesubtitles to False.

Add try except to fetchSubtitle and fetchSubtitleUrls.

Add get subtitle with type support.

Remove unused and check subtitle_url.

add socket_timeout for urlopen.

Fix getVttUrlFromSubtitles not correct.

Fix item.keys not list.

'dict_keys' object has no attribute 'get'

rename getSubtitle to fetchSubtitle.

Add async to functions.

Fix 'dict_keys' object has no attribute 'length'

Fix code error

Update readme.

Duplicate from lanbogao/docker_fastapi