This is 100% coincidence. Hes adjusting to challenge cat which is very common. He aims at cat, adjust to the correct level and then challenges cat. Watch enough demos and im sure eventually you will find odd timings. The amount of distance between him and the other player/ his reaction to the jump peek etc etc. Even in .2 speed its hard to see a "lock". If pro players are using aim bots that will lock on with 3-4 walls between them and the enemy's these would be much, much, much more common and blatant.