[JSInterp, YouTube] Support YT player `b22ef6e7` etc #2980

Job	Run time
Select tests from inputs	1s
Linter	16s
Run tests (ubuntu-20.04, 2.7, cpython, core, sh)	1m 3s
Run tests (ubuntu-20.04, 3.2, cpython, core, sh)	1m 8s
Run tests (ubuntu-20.04, 3.5, cpython, core, sh)	1m 2s
Run tests (ubuntu-20.04, 3.9, cpython, core, sh)	59s
Run tests (ubuntu-20.04, 3.11, cpython, core, sh)	1m 1s
Run tests (ubuntu-20.04, pypy-2.7, cpython, core, sh)	2m 21s
Run tests (ubuntu-20.04, pypy-3.6, cpython, core, sh)	2m 31s
Run tests (ubuntu-20.04, pypy-3.7, cpython, core, sh)	2m 50s
Run tests (windows-2019, 3.4, cpython, core, bat)	2m 33s
Run tests (windows-2019, 3.4, cpython, nodownload, bat)	1m 37s
Run tests (ubuntu-20.04, 2.7, jython, core, sh)	3m 7s
Run tests (ubuntu-20.04, 2.7, jython, nodownload, sh)	28s
	20m 57s

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