Considering I can find plenty of nonstandard Windows 11 install guides on youtube I don't think this guys video was taken down for that reason. Most likely hit with automated moderating and he probably said "kill" in the video while giving instructions. That could trigger the violence filter and now he gets tons of more views from idiots thinking Microsoft and Google are working together to protect Win11 from a supposed massive wave of people going around the sign in requirement. Or whatever other grievence they have with Windows.