Actually, it shows what I saw which was that he caught the ball in the air after he had been in the frontcourt and then landed in the backcourt with it. Generally, when a player is in the air it is where he had been last that matters.
For example, in a situation in which a player with the ball in the frontcourt passes the ball to a 2nd teammate who has jumped from the backcourt and has not landed in the frontcourt, then that is a backcourt violation because the 2nd teammate had not yet established himself in the frontcourt.
In no shape or form did Wade catch the ball in the frontcourt with his foot down. What he did do is catch the ball after he had jumped from the frontcourt into the backcourt. That much is certain.
Upon seeing the clip for the 5th time, in slow motion, he may have caught the ball and landed his feet at the same time in the backcourt. May have.
It doesn't strike me as a horrible or obvious call.