The front is the best angle as it shows exactly how much shoulder room they have. The side angle compresses things and makes the lanes look half as wide as they actually are.
Everyone who's ever run on a track knows you can easily fit two runners in a lane. Look at the video, prior to Hocker's move Nillessen was on the inside of lane 1 and both of Farken's feet are in lane 2. Nillessen tries to hold off Hocker by sliding right a bit, which led to Hocker rubbing elbows with Farken.
Ridiculous to DQ someone for such minor contact when no one fell, no one broke stride, no one was pushed or shoved, and the only runner who might have been affected admits he was already falling back on his own accord.