I usually see busdrivers refer to a front raise variation, turning the weight kinda like a busdriver turning a steering wheel.
Some people just hold the weight out in front and turn the weight, some add a full front raise like in the video (squat stance not necessary). I guess you could either do it with one dumbbell in each hand, still getting the rotation movement, or holding one dumbbell with both hands just like the weight plate.
Crazy 8s could really be anything. Locking the weights out overhead and walking in a figure 8 pattern (for shoulder stability). Something like old school 21s where you do maybe 8 partials at the bottom, 8 partials at the top, and then 8 full reps. Hell, maybe some funky lateral raise/front raise combo where you wave dumbbells in a sideways figure 8/infinity sign in front of you.