I wouldn't fault youtube on that specific point. Swiss german isn't really recognized as a distinct language, and it is pretty fragmented by regions/cantons.
What is more complicated is more the fact that we have 4 official languages :)
Their failure to differentiate Swiss German isn't the problem as of itself. Rather, it is a clear example of why they should stop being opinionated about the language that their users want.
What is more complicated is more the fact that we have 4 official languages :)