She says "oppor-choonity", yeah. But that's her accent, and I don't see any reason why a learner should pick that kind of Indian English as their preferred accent. There are a lot of other accents as well, there are a lot of differences, so you can't really say how a word should be pronounced "in general".
I don't even know what the original question was anymore. Anyway, as we said, it's usually "oppor-toonity" in the US, while "oppor-chewnity" is heard in the UK, and common in Estuary English at least (HA! Nona says it, I bet she says Choose-day!
) Another version is "oppor-tyoo-nity".
So... there's nothing else to say, I guess. Just pick the dialectal features you like the most.