Very nice reaction but i don't think Kakashi would be surprised of Naruto being a Jinchuriki.. also in Naruto part 1 none of them knew what Jinchuriki were so only Gaara would say "hes a Jinchuriki?"
Also Gaara wouldn’t react to Naruto beating some one up like that. If they had already met maybe he would react like that but if he didn’t meet him yet he would assume he is the same as him probably
I closed my laptop last night watching this and opened it up just now, full screen, to 17:05 and I jumped. Like it genuinely scared me to the point that I almost screamed