I think you're misusing the phrase "turns over", which means that the engine is spinning, but not starting to run. Failure to "turn over" means that you get nothing but a click or bump, such as with a totally dead battery, or no sound at all, such as with a disconnected battery.
Assuming that your engine is indeed "turning over" when it fails to start, I would suspect one of two things first: a faulty automatic shutdown (ASD) relay, or a faulty crankshaft position sensor (CKP.)
To test the ASD relay, located in the electrical box under the hood, swap it with the horn or AC relay (whichever one is identical; both are on mine.)
I did not view the attached YouTube video because I'm at work and cannot do it on the terminal here.