"Threat has been detected" when I enter Youtube.

venom0706

Distinguished
Aug 18, 2012
344
0
18,790
I entered Youtube few minutes ago (using Google Chrome) and my Avast detected a threat (URL:https://yt3.ggpht.com; Infection:URL:Mal). The warning appears every 30 seconds or so, while Youtube is opened and disappears when I close the webpage. Anyone know what is happening? It is really annoying. Thank you.