Instead of verse in the surah, he probably said Verse of the Sword
The YT poster continued:
Quran 9:5 Then, when the sacred months have passed — that is, [at] the end of the period of deferment — slay the idolaters wherever you find them, be it during a lawful [period] or a sacred [one], and take them, captive, and confine them, to castles and forts, until they have no choice except [being put to] death or [acceptance of] Islam
Very good! Thanks for the ping. :)