Bradford White water heater: burner making loud noise towards the end of the heating cycle

The video did not load for me. But your description sounds normal. The gas valve opens, there is an in rush of gas/ air mixture when it contacts the pilot or hot surface ignighter the flame can be pronounced or large at first. When the temp set point is met the valve closes and the flames consume the remaking pressure and go out. Your flame should be strong and mostly blue with possibly some yellow at the tips, if your flame is lazy and alk yellow you may need to clean the burner assembly and the venturi that allows the air to mix with the gas . from your description it sounds normal.

Want to share what I learned.

Thanks to Ed Beal who provided suggestion. I opened the unit and removed the burner assembly and cleaned the filter area. There was not much there. This did not help the situation.

Called our local plumber who guessed that the burner assembly was damaged. He was right. The burner assembly which looked like a exhaust on a car had a tear in the mesh. New burner assembly was installed and we are all good.

I have been told by multiple plumbers that they highly recommend Bradford White including the most recent plumber. With that said, I am not too thrilled with their product. Within the last 5 years (unit was purchased in 2014), we have had to shell out close to $700/- in repairs. This does not include parts because the unit was still under warranty. First two incidents dealt with the control unit by Honeywell that was bad. Now the burner unit.

Anyway, wanted to share my experience.