I guesstimated that it was either youtube or xvideo. However, Incapsula announced yesterday that it was sohu.com, a $2.5B Chinese Community similar to Yahoo. The bottom line is my guess was wrong. However, the data point given by Incapsula, “high profile video content provider” made it seem like a video hosting company. If they would have said “high profile community”, than I probably would have been warmer in my guesstimate. The big lesson learned is that all billion dollar web properties need to use a CDN with WAF (web application firewall) to prevent this type of malware infestation.