No No No. Anti competitive behaviour doesn't arise when consumers all choose to use a particular product because they can't be bothered to try others out. That means the product they chose is likely sufficient for their needs. The dominant use of Google Search doesn't preclude anyone from using Bing if they choose, and for this reason Google's dominance in search isn't anticompetitive. It's only when they use this dominance to enter and dominate another market (or, as in this case, preventing WinMobile's youtube app from accessing the same video metadata available to Android and iOS youtube apps).