Great Video. Original MaxxAir comes with the brackets shown in the video. There's a MaxxAir-II that adds louvers to the sides and it comes with brackets that have hitch pins. With those, you can swing the cover out of the way for access without tools to the vent area below. The kit can be ordered separately for Original MaxxAir. I installed Original on our bathroom vent and II's over our two FanTastic vents. The II is promoted for FanTastic installations although some say it reduces airflow. I liked the style of the II over some of the specialized designs for FanTastic, and I don't feel I've lost significant fan performance. The price is also much less.
Critical dimension installing these covers (MaxxAir or CAMCO or anybody else) is to be sure the rear of the cover isn't too close to the rear of the vent lid. Too close and the vent won't open or won't open all the way. That's happened to me and I didn't have to re-drill the vent flange. I had used the middle of the slots in the covers when I laid out the flange holes, so I could just pick another slot.
30 minutes to do your first one, 10 minutes each from there on.
FanTastic uses a plastic roof flange, and I dismantled them to get the nuts provided by MaxxAir installed. I decided I'd use stainless sheet metal screws on any future ones. The plastic is plenty thick to hold self-tapping screws and an RV shop told me that's how they install onto FanTastic. I would NOT do that on metal flanges. Material's just too thin to hold with vibration. Calls for the machine screws with elastic nuts or lock washers.