From looking at your video,the release elbow is 1 issue that can cause your problems.Having everything in line with the arrow is something we should try to achieve.But,you are also punching the trigger.It is a smooth punch and would be quite effective for a quick command release in a hunting situation but for target groups,firing with BT is crucial.

Now,as far as equipment,the radiacal bow will magnify the other issues but tight groups are attainable.I would put a longer stab on the bow,a 10" with the weight out front might do a great deal for tightening the groups at distance.


Another thing I am sure you have seen talked about is trusting the float.Let the pin float around the spot and trust that your Bt will put the arrow in the spot.