yeahh my thoughts exactly. The fact that the Japanese music videos were blocked on the ground that "This video contains content from DSP Media and UMG." says so much about their YT account management ):
I think they really need publicity, even for the main DSP channel. Most know that sment, jypentertainment and YGEntertainment channels exists on YT and artists in JYP and YG have their own channels as well. 4minute used to post on VEVO but their main account is better managed.
So I think DSP needs to step up their front on YT, since they might be losing a lot on potential revenue from YT.