[Bilibili] Fix extractor

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Closes #1714

[Ashish0804]

Changing id that too for such old and famous extractor is a no-no imo
Are u sure there's no way to keep same ids?

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Changing id that too for such old and famous extractor is a no-no imo Are u sure there's no way to keep same ids?

Idk what is the cause but that's what extractor returns otherwise test will fail.

[pukkandan]

The test failing is clearly not caused by your changes.

But changing the test to fit the code without understanding why it fails is not the right practice. Maybe you are right and the test is just wrong. Or maybe, this was never the intended behavior and the issue is in the code

This seems to be actually a bug in the anthology code. This video's extracted id changes depending on whether --no-playlist was given or not. See #1819