Pain radiating down the arm is not a good thing, but I don't see anything in your squat that would cause it. Of course, I cannot really see your arms, either.
You need to go deeper by about 2 or 3 inches. You let the bar drift forward a little at the bottom, which is probably an artifact of you dropping the chest near the bottom instead of dropping your ass lower. Going deeper will probably necessitate a bit of a deload, which may also give your shoulders/neck a little chance to heal. Check out the sticky on filming form checks.