The specific section is here: https://youtu.be/mk4KR02iF5M?t=280
Mueller: "That is not the correct way to say it. As we say in the report and as I said in the opening, we did not reach a determination as to whether the president committed a crime."
Fair enough. He doesn't mention whether it was a deciding factor unless I'm missing some earlier quote? The OLC opinion (assuming he abided by it, which seems to be the case) means he has no business even making a determination as to whether the president committed a crime. It's very frustrating that the OLC opinion prevents us from really learning more, but I'll grant you we have to live with it, and shouldn't legally assume any more than what was presented.
We'll see what history decides. I'm pretty sure he's a crook, but I'm pretty sure OJ is guilty too. Hope I'm wrong.
https://www.pbs.org/newshour/politics/watch-mueller-clarifie...
Regarding indictments -- staff indictments were for unrelated crimes, and the indicted foreign entities were found to be unconnected to the campaign. The legal system cares about deductive logic, not inductive.