Marc,
Clarification? You are a left handed shooter and your misses are to the left -- that would be between 10 and 11 on the clock face????
If you watch your second video, the one from behind/above, watch your bow hand at release. See how it moves to your left? Ideally it should move SLIGHTLY to your right -- the other direction. That tells me that at release, you are loosing a little back tension. This COULD be the reason you are hitting to the left.