I wouldn't ever take my Commander to a place like AAMCO. I might take it to the dealership but even then, especially on the transmission, I like to do it myself because it gives me the opportunity to take a look at the magnet. You want to see fine ground metal, almost like pepper. You don't want to see silver shavings.
Some comments on the videos: I know sometimes you have to do what you have to do, and if you have to use a screw driver then you have to use it to get the pan off, but I wouldn't bang it in there with a hammer like that, you'll wind up gouging the mating surface of the transmission which is aluminum and causing a leak.
Also, it's pretty half [removed] to leave the old seal in the transmission. If you're doing it for yourself that's fine, but if you want to make a DIY video it should be done right.
Also, the manual will typically tell you to loosen all of the bolts a certain amount, and then to loosen the bolts towards the back more so that the oil can come out, I wouldn't remove them all and leave two or three holding the pan in.