I have a 07 Si 4dr, it randomly will do a very harsh start or even sometimes not start at all. But once its started its fine, it will just crank but not start. Here's a video of it happening. But sometimes it will last longer than this. Sounds like a bearing or something like that.

 

Wouldn't let me post in original post

 

Get it to a garage...fast...on a tow truck...

 

Why do you say that? Is there anything that I can do to diagnose it?