I agree that it's interesting. In spite of what this surgeon says, you do not need to do lots of active exercises to rehabilitate a knee after replacement. Many of us have had successful outcomes without formal exercises, but just by allowing our activities of daily living to be our exercise.
It's important to give the knee time to start healing from the surgery before you start doing a lot of exercises.
My surgeon doesn't allow any PT at all for the first month after a knee replacement. He says your knee needs that time, to start on its journey of healing. For that month, we rest, ice and elevate our leg, and walk around the house.
After that month, we just go to PT once every 2 weeks, where we are shown a few new exercises to do at home.
His patients all do well and achieve good ROM (Range of Motion), as I did, and he hasn't had to do a manipulation to help with ROM for the past 4 years. I think that speaks for itself.
The surgeon on this video says you can start driving from 2 weeks post-op, and "If you can walk to your car, you can drive."
You need to modify his advice with a lot of common sense.
While you may be able to walk to your car, getting into and out of the car may present problems.
You need to be clear-headed - which means you need to be off the heavy-duty narcotics.
You need to be able to do an emergency stop, and to operate the foot pedals quickly and accurately.