Why is the official Youtube channel of SGO48 gone ?  

Wasn't there another artist whose channel randomly disappeared just a month or so ago? I remember hearing something about it but I can't recall who it was.

^ I was thinking the same thing. Seems pretty odd to just happened out of nowhere. Likely has to do with YouTube adjusting things for misinformation. 

That is odd. It was there not that long ago. Did they maybe change it or something? I don't understand what happened here. I can't find it!

I remember Han Sara's channel went down but now it's back online. YT is probably blocking channels on accident. This is what happens when you rely on algorithms to do the job.

Likely the automated system flagging it by mistake. I am sure it will be back soon. Happened to a number of channels I follow in the last few years. 

What is it? I even don't know about it  

I tried looking for it and don't see anything about it but I did see someone mention it on Reddit or something saying that they moved to another platform which doesn't make any sense. I am guessing they were either hearing wrong or lying.