This method is needed for YouTube stream tests, because when all YouTube tests are ran, the signatureTimestamp is known (the sts string) so a different body than the body present in the mocks is send by the extractor instance.
As a result, running all YouTube stream tests with the MockDownloader (like the CI does) will fail if this method is not called before fetching the page of a test.
The strings playerJsUrl, sts and playerCode are now static in order to don't fetch again the JavaScript player at each time the signatureTimestamp is needed.
Catch every exception instead of only IOException and ExtractionException.
Add JavaDoc for fetchAndroidMobileJsonPlayer method of YoutubeStreamExtractor
Try to don't fetch again the first page of a YouTube channel when requesting a continuation of it by trying to store the channel name and the channel id into the next page using the ids field of the Page class.
Use the youtubei API for YouTube mixes. The corresponding has been updated because the new API breaks the tests of YoutubeMixPlaylistExtractorTest.
Remove some deprecated code (the old search code with the pbj JSON) and do some other improvements.
Use the Android mobile API to get the itag 22 (720p with audio), removed when the content is protected by signatureCiphers.
Also use this API when they are OTF streams, to get the itag 17 and 36, low 3GPP quality streams but also the itag 139.
Update the web client version.
Use again www.youtube.com and music.youtube.com domains instead of youtubei.googleapis.com domain because it spoofs more a web client of YouTube or YouTube Music and may reduce Google's detection of NewPipe Extractor users.
This commit updates mocks and reenables the test invalidId of the NotAvailable class of the YoutubePlaylistExtractorTest class beacuse with the youtubei/innertube API, it returns "Not found" and doesn't redirect to the YouTube homepage.
The expectedMetaInfo test of the MetaInfoTest class of the YoutubeSearchExtractorTest class was broken because YouTube removes the vaccine progress link of the WHO from the meta info so this commit removes it and the test is now passing.
Add the origin and the referer headers with the https://www.youtube.com value for YouTube JSON POST requests.
Don't add the consent cookie header for the requests which use the youtubei/innertube API because it's uneeded.
Fix some tests and update YouTube mocks
Get the real name of the uploader (for autogenerated channels and music artist channels), like before the migration to the JSON pbj.
Do some other improvements, especially reformatting some code to be in the 100 characters line limit and use final where possible.
Change the domain from music.youtube.com to youtubei.googleapis.com.
Use a lightweight request to check if the hardcoded YouTubeMusic keys are valid. Increase the length of the response to 500 because if the key is invalid, the length of the response returned is higher than 250 and the response when the key is valid is higher than 1500.
Format the YoutubeMusicSearchExtractor file.
Update YouTube web client version and mocks
Add getSearchParameter, a new method in YoutubeSearchQueryHandlerFactory class which returns the params field for a search, or an empty string if there is no one.
Update mocks of YoutubeSearchExtractorTest.
