It sounds a *little* like a fuel injector solenoid ticking. It also sounds a like a bad DISA unit. These sounds however, usually don't just go away by themselves. It is difficult from the video to really tell where the noise is coming from.
Other possibilities - bad pulley, bad pump... Any codes being thrown?
If you can pinpoint where the noise is coming from with more accuracy (use a mechanics stethoscope or an arms length of garden hose held up to your ear) , there might be more help that we can give you.