Ask HN: Can an YouTube uploader possibly remove dislikes?

They can take down the video and reupload it resetting the views, likes etc.

But seems the "upload time" didn't change.

Then the dislikes were probably registered as bots by YouTube and removed for being fake even if they were actually legitimate. Botting dislikes on your competitors game announcements is probably common as a way to increase your own sales.

There's also the possibility Blizzard paid off YouTube.