BBM That's how I see it. The brief for this company had to be to create a 3D animation of OP's statement to his own DT. He said clearly in his bail affidavit that he put his legs on before going back to the bathroom, kicked the door, went back to the bedroom to get his bat before reaching Reeva. Somebody had to have given instruction for the animation team to film him without prosthetics on struggling with Reeva. The only reason to have him on his stumps in the toilet was to create a safety net for the DT and not to assist the court.
Don't forget he also described it as "I battled to get her out of the toilet and pulled her into the bathroom", if he'd already had his legs on I believe he would have just picked her up and taken her straight downstairs, no need to put her back down on the bathroom floor.
So I don't doubt he was still on his stumps when he dragged RS out, I don't think he put his "legs" on until she was already laying in the bathroom and he'd made his calls to Stander, security, etc, then once he had his ducks in a row he put on his legs and made his grand descent.