Let us see facts. all aircraft with canard foreplanes, can use them as roll control, however due to wing canard interaction the roll control is negligible, thus they need to resort to elevon control (trailing edge flaperons),the J-10 and well as the Eurofighter or Rafale and Gripen can use their foreplanes as roll control devices, however they usually leave that task to the elevons.Actually, at 1:46, the canards do seem to be at different angles. One side got the sun reflection first, then the other side.
But who knows, I don't claim to have super eyes (unlike you) to say one way or the other.
In the video you can see the canard not moving simply because the J-10 wing can be used as the wing of a Mirage 2000 or LCA and achieve roll control without the use of any canard input.
tailplanes are different and in that aspect more effective, because their wake does not down wash the wing its use is less restricted
you can see it in the same in the Eurofighter