Keep in mind, this stuff is all plug and play designed so even the lowest skilled/paid slave labor can assemble the machines and not plug the wrong thing in the wrong place.
Prior to watching the video, I was going to recommend paying a few bucks to justanswer.com to talk via email to a certified tech who could walk you through the process and/or have him at your disposal to bounce questions and concerns. But I don't see how even that would add anything here. Unless there is some doubt as to what the actual problem is - but I don't even think that matters at this point since you already purchased the replacement parts. Might as well stick them in and see if that helps.
I have used justanswer.com twice to do repairs on my furnace. It was nice to have them on call for questions and in one case I used them to diagnosed the problem. I assumed my glow plug was bad so he was able to walk me through it to confirm by telling me where to place the ohm meter leads.
I once pulled my gas dryer apart on my own by using the process laid out in a repair manual I downloaded online. A repair manual is handy when you are pulling all the major components out one at a time as it gives you the proper sequence of events. But from the looks of your video you don't even need that to replace those two components. Repair manuals can be downloaded free from some of the appliance repair blogs. Don't pay for a manual from one of those sneaky websites that charge you for things you can find other places for free.