Haener film looks better than Young.

Yeah, Marino had a notably strong arm and Haener isn't remotely on par with him in that regard. I also don't think that particularly matters.

What matters is if Haener has enough arm strength to play at this level, and whether he can develop the other skills to compensate for not having elite arm strength. I believe his arm is sufficiently strong enough and time will tell if he can develop his overall skillset to become a successful NFL player.