The animation wasn't too good but it served it's purpose well considering this is supposed to be a training video. I quite enjoyed the part where the Medic team killed too. I'd do the same if I were in his boots.
Also, as a TF2 Player I feel for you man. I have the same problem... I'm like: "I'm only 1 guy, I CAN'T HEAL ALL OF YOU!" or "Guys, we don't even have a Medic... stop calling for one." but it never works. :/