Could it be that this video is actually a bit older already and shows the already known aircraft in production so the naval ones are from the LRIP-batch (aka Batch 00xx), whereas the J-35A are from Batch 01 and differ a bit to Batch 00?
Good question. I can't say for sure TBH. Judging by my old eyeballs, this J35 appears to have the same standardised vertical tail design over the initial prototypes or LRIP where the rudders extend the full length of the vertical tail, so it may not be the initial batch.
I also can't seem to see if the canopy has the old style detonation cord design....but being able to see it here is almost a superhuman effort.