HELP! I think my yaris is dying *VID inside*

[Mr.Tmosh]

Hey guys I'm new here.

I have a 2007 Yaris sedan and I thing It might be dying. Idle is very erratic and it drops to 300 or something like that.
I've tried everything:

• Changed Sparkplugs
• Cleaned the throttle body MAF and IAC valve
• New ignition coils
• Checked Alternator
• Couldn't find Vacuum leaks
• Motor mounts are still OK

But the idle is still rough after a while, and it makes it undriveable under heavy traffic.
The engine shakes violently and that's why I think it might be dying.

See, here is a video:
http://www.youtube.com/watch?v=R2S8mYL4p-k


Sorry for the quality but my cell phone is crap.

Any ideas of what could be the cause?
I don't know what else to do. Please help me.