[throwaway613834]

I wasn't aware, thanks for mentioning that. However, the videos I watch are on YouTube and news sites and such... not sketchy sites. And I never play MP4s on my phone directly (unless they're videos I've recorded). I'm not sure many others do either, frankly. So how much do I need to worry and how much of a justification is this to upgrade the phone every 1-2 years?

[dmoy]

Right this is sort of the point. You were not aware, if you had based your defense against unlatched vulnerabilities based on your knowledge 24 hours ago, you could quite easily have gotten pwned. Knowing about all vulnerabilities that could affect you and how they work is incredibly difficult. I don't want that risk (nevermind that even if I was ok with that risk, my company would throw a fit if they found out I was using an unpatched OS).

[djrogers]

> I never play MP4s on my phone directly

A good chunk of he video on the internet is mp4, so how would you know if you were playing an mp4 or not?