my car has recently started doing this on cold starts, after driving it for a while it will start up normal without any noise. We've tried to find what's making this sound but as you can see in the video the noise only last for a matter of seconds wich does'nt give us the chance to pin point what it is, anybody have any idea where this noise is coming from or has it happened to anyone before???

http://youtu.be/mQpQEphPP8o

 

One of your two belts, either the alternator belt or A/C belt. It's either loose or stretched and in need of replacement. Very inexpensive and easy to replace.

 

ahh ok thanks, now i'm thinking it could be the alternator 'cause i just replaced the a/c belt like around 8 months ago

 

yup check ur belts and either tighten or lossen them as needed and it should go away