Fix support for redbull.com (redbull.tv has moved to redbull.com)

[gschaffner]

Checklist

• I'm reporting a new site support request
• I've verified that I'm running youtube-dl version 2019.08.02
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that none of provided URLs violate any copyrights
• I've searched the bugtracker for similar site support requests including closed ones

Example URLs

• Single video: https://www.redbull.com/int-en/films/AP-1ZSMAW8FH2111
• Single video: https://www.redbull.com/int-en/episodes/AP-1TQWK7XE11W11

Description

RedBullTV is supported by youtube-dl. However, it appears that links to videos on redbull.tv redirect to redbull.com rather than redbull.tv. Trying to download these videos results in an Unsupported URL error.

It also appears that some redbull.tv links (such as https://www.redbull.tv/video/AP-1Q6XCDTAN1W11 and https://www.redbull.tv/video/AP-1PMHKJFCW1W11 from the RedBullTV extractor's tests) now redirect to redbull.com with a different URL format.

[gschaffner]

It appears that multiple of the tests in redbulltv.py are no longer playable in browser.

[gschaffner]

Additionally, redbull.tv is now redirecting to https://www.redbull.com/int-en/discover (for my region, at least). Thus, I believe it is safe to remove support for redbull.tv URLs in favor of redbull.com ones.

[Boris-de]

Thanks! The referenced PR works for me with one exception. Sometimes the URLs do not have an "AP-..." id, but instead have a slug in that place. Can't find the in the HTML, so not sure how to get it.
Example: https://www.redbull.com/int-en/episodes/age-of-ondra-part-3

[Boris-de]

One more thing: #21781 has URLs that are also not supported yet, but as they have an AP-id they look like they could be added by changing the regex.

[gschaffner]

@Boris-de Thanks for the feedback! I've updated #22063 and slugs like that should work now.