Hi Rance , The video reveals a lot. Your rifle is not being supported at the stock. When you take the shot the bipod lifts clear off the ground caused by the recoil, this will have a bearing on your grouping. I was an army weapons coach in a previous life and trained recruits in the use of small arms. The British Light Machine Gun had a bipod and could prove a deadly accurate or terribly unstable weapon depending on who was using it. , The pistol grip was a little further forward and we used to grip the butt with our left hand to help stabilize the weapon… It had a bipod similar to your rifle which bounced around a lot. If you mounted the LMG on a tripod you greatly increased the weapons accuracy.
Try supporting your stock with the left hand, keep your left elbow on the ground close to your body. It may help you stabilize the weapon if you wrap your rile sling around your left arm. Be careful not to tense up, watch your breathing. Take a deep breath and partially exhale just before taking the shot. I noticed your face twitched a little before you took the shot, that may indicate a little momentary tension just prior to easing the trigger. For some additional tips check out some Army and Olympic training vids on YouTube. Hope this helps.