Good luck. I have been canning venison for several years. Filling the canner with water up to the collar on the jars per that video seems excessive. Check your manual. I have a middle of the road presto canner and the book instructs to add 3 quarts (12 cups) of water to the canner once the jars are placed on the rack. This only brings water up several inches on the jar. Once the cap goes on the vent, I think its impossible to lose the water as vapor from a pressure canner. I process my pints for 75 mins @ 11 lbs. Later, when it cools and I remove the cover, I have about the same amount of water as when I started. Best thing to do is check the manual. It will tell you how much water to add.