This one. Only a J-15-lookalike shape, though - Alongside the CATOBAR CV-18 below.
View attachment 118002
This is just a J-15 silhouette on a graphic of CV-18, so a rather low effort PR segment.
I think it's a bit of a stretch to say this is "J-15B related" because for one, we all know J-15B exists (we have multiple pictures of it), and we already know it will be part of CV-18's complement.
If anything I would say that video tells us nothing new and gives us no new information about J-15B at all.
At most it can be viewed as the PLAN indirectly alluding to a J-15 variant being intended for CV-18, which for the general populace is perhaps useful but for us is information we've known for years with much more detail.
I wouldn't quite say it's a waste of time, but I do think the video should be acknowledged as not telling us anything new and not having anything interesting.