youtube-dl 2019.02.18

Extractors

• [tvp:website] Fix and improve extraction

• [tvp] Detect unavailable videos

• [tvp] Fix description extraction and make thumbnail optional

• [linuxacademy] Add support for linuxacademy.com (#12207)

• [bilibili] Update keys (#19233)
• [udemy] Extend URL regular expressions (#14330, #15883)
• [udemy] Update User-Agent and detect captcha (#14713, #15839, #18126)
• [noovo] Fix extraction (#19230)
• [rai] Relax URL regular expression (#19232)

• [vshare] Pass Referer to download request (#19205, #19221)
• [openload] Add support for oload.live (#19222)

• [imgur] Use video id as title fallback (#18590)

• [twitch] Add new source format detection approach (#19193)

• [tvplayhome] Fix video id extraction (#19190)
• [tvplayhome] Fix episode metadata extraction (#19190)
• [rutube:embed] Fix extraction (#19163)

• [rutube:embed] Add support private videos (#19163)
• [soundcloud] Extract more metadata
• [trunews] Add support for trunews.com (#19153)
• [linkedin:learning] Extract chapter_number and chapter_id (#19162)