I took the dryer apart (front, back, top off and drum removed) to get access to the gas valve assembly. (No video available that I could find.) It was only necessary to remove the back panel and front kick panel to get access to the screws that hold the valve assembley and igniter in place, pull the assembly, remove the gas fitting at the pipe end, clean it up, install it on the new valve assembly, install the igniter assembly on the new valve assembly, and install the full assembly in place. The one advantage to my approach was that I could vacuum out all the years of lint from around everything and do a 1st class safety clean on the dryer interior plus inspection of felt seals, drum roller, idler wheel, and belt. Regardless of how far you disassemble the dryer to replace the gas valve, if you haven't changed the igniter recently, do so now while the assembly is removed. Critical note: You will need some expertise in working with natural gas line compression fittings and NPT gas fittings and how to check for gas leaks. If you have not worked with natural gas fittings, don't attempt this repair. Changing a BBQ propane tank does not count!!