Engine Ticking Noise

Hey guys,

Can an anyone identify this ticking noise? It started last night after a bit of a booting and gets slightly worse once the car warms up. I recorded this video with a cold engine. Oil level is fine. Sounds very much to be coming from the top on the engine.

http://youtu.be/huQTxS8TNVA

Cheers!
Ade
 
could be a broken hydraulic lifter as it sounds very much valve train noise generated
 
could be a broken hydraulic lifter as it sounds very much valve train noise generated

Thanks, topped it up with some oil and its gone a little quieter. I'll try flushing the engine first since its been about 8 months since the last oil change.