Much more simpler solution is to add it in the form of a flag.
--enable-features=ExtensionManifestV2Availability
No quotes, commas, exclamation marks, mysterious signs or ancient runes needed.
I'd even say @jumperlost two times already, because there's not such word.
https://msfn.org/board/topic/102111-change-a-letter-game/?do=findComment&comment=1265939
In standard (not internal developer coding) names it's either VC1 ot AVC (without the "1"). Or it's simple to confuse with AV1, then.
What Are HEVC and AVC? H.265 and H.264 Video Codecs Explained
HEVC = H.265
AVC = H.264
Details:
https://www.tomshardware.com/reference/h264-h265-hevc-codec-definition