well i dont know what they're talking about in this vid since i don't speak korean but..... on BEAST unplugged concert (july 27th) the boys talk about this matter.. they know what Mnet said, so BEAST said "it's cooler to diss about dance songs, so just understand THEM"
my opinion is that b2uties are not exactly misunderstood.. BEAST wouldn't bring the Mnet talk if it was just a misunderstand (well at least, they'd probably say that it's just a misunderstanding and tell us not to worry about it), but no.. on the unplugged concert they told the fans to UNDERSTAND that there must be people out there who criticize them.. and i guess they don't talk about this matter on social media bc they afraid that it'd be a bigger issue later on, instead they talk about it on their unplugged concert which prohibit the fans to use camera or phone so that it wouldn't be too exposing.