[bandcamp:album] Fix test case
[myspass] Modernize test case
[youjizz] Modernize (#4131)
[test_youtube_signature] Fix import

Broken in commit 8c25f81beea169c9d6540eea1a6f71dc045da6ed
[byutv] Update test
[allocine] Update test
[abc] Update test case

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[YoutubeDL] guard against strange sys.stdouts