The purpose of "unlocking videos" was to avoid that English subtitlers begin to subtitle while segmenters haven't finished segmenting.
Here, it is segmented and it is subbed in English.
What's the use of keeping them lock now?
Normally, when it is not segmented:
It depends on the team instructions:
SEGMENTING LAST EPISODE PART: If you are the last segmenter to finish a part in an episode and there is no moderator or other instructions given, please unlock the video so that the subtitlers can begin to work. (To unlock a video, click More > Unlock Video.)
You can ask the CM or one moderator (what's the difference now about who unlocks what was unlocked before?)
Sometimes, I think rules are good but for this exceptional situation, no rule was made since who could foretell that this case would happen XD
These rules were made to organize a group of people working together and a precise process, not to disorganize them when an incident occurs.
I think you should feel at ease, it was already unlocked before, so unlocking them to allow people to subtitle it again is not a sin. It's just quickly restoring the normal situation as it was before the incident and I think that's what the team wants, a reactive unlocking and not being blocked by this unlock that has no more meaning once it's segged.