[YouTube] Fix nsig processing for player `b22ef6e7` #907

Job	Run time
Select tests from inputs	1s
Linter	15s
Run tests (ubuntu-20.04, 2.6, cpython, core, sh)	1m 16s
Run tests (ubuntu-20.04, 2.7, cpython, core, sh)	1m 6s
Run tests (ubuntu-20.04, 3.2, cpython, core, sh)	1m 5s
Run tests (ubuntu-20.04, 3.3, cpython, core, sh)	1m 11s
Run tests (ubuntu-20.04, 3.4, cpython, core, sh)	1m 17s
Run tests (ubuntu-20.04, 3.5, cpython, core, sh)	1m 12s
Run tests (ubuntu-20.04, 3.6, cpython, core, sh)	1m 12s
Run tests (ubuntu-20.04, 3.7, cpython, core, sh)	1m 18s
Run tests (ubuntu-20.04, 3.8, cpython, core, sh)	1m 5s
Run tests (ubuntu-20.04, 3.9, cpython, core, sh)	1m 12s
Run tests (ubuntu-20.04, 3.10, cpython, core, sh)	1m 8s
Run tests (ubuntu-20.04, 3.11, cpython, core, sh)	1m 6s
Run tests (ubuntu-20.04, 3.12, cpython, core, sh)	1m 6s
Run tests (ubuntu-20.04, pypy-2.7, cpython, core, sh)	2m 30s
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 35s
Run tests (windows-2019, 3.4, cpython, core, bat)	2m 23s
Run tests (windows-2019, 3.4, cpython, nodownload, bat)	52s
Run tests (ubuntu-20.04, 2.7, jython, core, sh)	3m 9s
Run tests (ubuntu-20.04, 2.7, jython, nodownload, sh)	26s
	29m 56s

Provide feedback