All of the videos have the same goal (realign/level your hips in relation to your spine). This is what makes one leg appear longer than the other (i.e. both of your legs remain the same length).
I'm fine. I was in to get my allergy shots. Thanks for caring!
My understanding is ice is best when used to stop inflamation and brusing--the cold helps reduce the flow of blood and fluids into the injured area (think cold causes fluids to slow down and/or thicken).
Cold is also good for pain (numbing effect) and reducing swelling (cold compresses/compacts/shrinks stuff).
Heat is used to move fluid away from the area--get the thickened/sluggish fluid moving by softening it up.
So it's cold at first and swapping between cold and hot afterwords.
**** I'm not a doctor, but I earned an Advanced First Aid card and Jr. Lifeguard cerficiate when I was in Highschool.