In case you want to see...
Let me go over to the closet and get out my sergeant hat...now that it's on...
1. They marched in combat uniforms, not dress uniforms with boots. (You sure as hell don't want to march in low quarters, so if you march in a parade in dress uniform you wear boots.)
2. Pick a headgear, guys. Some units wore patrol caps, others black berets. One unit had a mixture of patrol caps and paratrooper maroon berets.
3. They didn't size any of the formations. When you set up a formation for a ceremony, you first call the formation. Then you give them a "right face" and make this call: "If you are taller than the soldier in front of you, tap him on the shoulder and move forward." You do this until everyone is lined up with the tallest soldier in front and the shortest in back. Then you call another right face in the event that the reviewing stand is to the right of the formation when it's marching and have the troops shuffle into height order. After that you can call a left face and reshuffle but it's usually not necessary. At the end of it the tallest soldier is at the head of the formation on the side the reviewing stand is and the shortest is at the back in the column farthest from the reviewer. This looks really good and doesn't take long to do.
4. After watching the tracks going down the street I started thinking, "isn't this normally when people throw candy to the crowd so the little kids can pick it up?"
5. They didn't seem to be marching. They were all out of step and their rows and columns weren't dressed properly.
6. As you'll notice in the splash screen the tracks were in single file and not aligned with each other. Running these vehicles down the street single-file gives Trump longer to have a mushroom woody, but running them three abreast looks way better - and since they had all sorts of five-lane streets to work with they had enough room to do it.