Yeah Zemo not sending the tape in the first place is weirdFirst of all, how would of Rogers KNEW when there's nothing hinting he could of known. And 2nd of all, it is against his CHARACTER to hold secrets! So, he did know all this time, whether it's from SHIELD or by Bucky whenever they somehow had this so-called conversation (because it surely wasn't mentioned when he mentioned about the OTHER Winter Soldiers)....he WOULD HAD TOLD TONY... it is against everything that defines Captain America. Everything that he stood for in the previous films.
2nd of all, Tony was coming there because he KNEW THE TRUTH...only to disregard everything just because of a twist, seen a miles ahead, twist.....Even Black Panther, who saw his own pops blown up, was more understanding and he even he wasn't trying to go after everyone. Stark was willing to kill Rogers just because he knew about WS despite knowing WS wasn't himself at all.
And if this was the overall goal... then Zemo should of just SENT THE TAPE in the very beginning and made the entire film about about that and the stakes being higher than a so-called play "Civil War" 2/3ths of the film over a so-called misunderstanding that gets ignored anyway because Tony suddenly loses all reason. You may fucck with it, I DON'T.... especially how it was SET UP with Zemo just sitting there waiting and oddly KNOWING that Stark was going to show up to Siberia so he can show him the tape. It is HORRIFIC WRITING that people want to suddenly give a pass or cop pleas.
That's like Lex not sending Bruce the bounced checks in the beginning