yasuo cheating but I cannot use the replay function cuz of the upgradting

First of all, I am not a native speaker, so forgive me if I use wrong words or bad grammars. I meet a Yasuo yesterday (plat 5 and I check his history, he is the account owner and he doesn't play Yasuo a lot). I am a fizz main, diamond last season on another account. I thought he is just good at the beginning because his e q was so fluent and not miss one q(with the wind). And the jungler came couple times, so I thought I was just bad(I never lose to Yasuo as fizz before[I didn't mean that I am that good, just telling that I have the experience to deal with Yasuo] )Then when I arrive 6, I found things wired. I missed all my ult to him! Not like those stupid ults when he can see it from far, I use my ult while fight and close to face with my auto attack. But he dodges all of them with his wind wall. Then I check the replay last night, I try to used ult at beginning of our fight, the middle of our fight and near the end of our fight. He just can save the wind wall until the millisecond I used my ult everytime. And all of those walls were coming out at the same time my ult went out. I promise I didn't use my ult in a stupid way, cuz I know how to deal with Yasuo. So, I was going to record the replay and let others judge if he was cheating, but the version automatically upgraded, it says I cannot download the replay or play the rofl file I downloaded last night because it is expired. Anyone can help me to find me a way to record the video plz. Thanks.