I still think that is more than 12 feet. The problem, among many, with taser is the vertical dart spread gets really wide past 10 feet. Coming up from behind is the best target, and less chance of hitting less desirable areas of the body. The thick clothing would also work against getting a solid circuit.
At 9:32 in the unedited film, the officer to the left is no more than two times the width of the Lavoy’s truck from Lavoy. Assuming the back of the truck is about 6-6.5 feet, that would put the officer at about 12 feet.
From Wiki and multiple product sites, the effective range of the taser is based on the cartridge used, but almost every model has an effective range of at least 15’ and many up to 35’. Also, the farther spread of the prongs, within reason, increases the effectiveness of the taser.
Also, the angles look liked he got tased in the front/side, not in the back, so clothing would not be nearly as big an issue.
Finally, read my first post and watch the video to see how the officer is behaving. There is no rational basis for some of his actions unless he used a taser.