Within a group of 63 online video destination sites tracked by HitWise, YouTube increased market share to 75 percent from 59 percent from May of 2007 to May of 2008. Visits among all the sites were down a scant over 1 percent, but time spent on the sites were up 9 percent. Why are views slightly down? One reason is because more visits are going to video destinations not in the top 63. Though 58 other sites not in the top five, taken together, lost share as well, from 12 percent to eight percent of totall visits.