Problem is correct in that Kaantantr still has a video up about him (or, at least, a particular segment of the video is about him) under his old name, "Star King Demon Lord" (mispronounced in a distasteful way, as is the pinnacle of comedy). He refers to Problemexe as an idiot and seems to make fun of his Reddit karma, of all things.
I'm not certain if this would classify as a genuine breakage of rules, however. The given instance of a "video about Problemexe" isn't really too strong of an argument, as it seems to be a single segment over two hours into a video. However, the guy is giving out names, and does appear to have the following to render even a minor offense such as this as genuine harassment.
I do think that, if possible, the video ought to be edited to remove specific names, though I think that it is unlikely to lead to anything major occurring- the guy has a fanbase, but it isn't a very large one.