PART 2 Video - Weird engine noise

[Pisendar]

Hey guys.
On one cold night i decided to a take a little drive around since i barely drive my x5. So as soon as i turn on the car, i heard weird noise coming from the engine (either not engine) and few second later car almost like turned off by it self, but was able to keep up.

I am not sure if its normal or not, but something tells me its not. A made a little video so please watch and listen carefully to the engine sound

It starts on 2:25

YouTube - X5 noise
I dont want to sound too dummy but my guess - water pump, bad coil, spark plug and last one alternator is failing (m5james opinion,thanks)

I am planning to drive up to Big Bear lake , and not sure if it is a good idea

Thank you very much guys


------------UPDATE -----------
First suggestion i followed is to fill up the tank , so i did ,,, didnt feel the difference though. and this time you could hear the noise as soon as i turn on the car !!! PLEASE LISTEN carefully !!!!!

YouTube - X5 noise - part2