Some users may have Android 2.1,Android 2.2 or Android 2.3 tablet PCs,but with a Adobe Flash Player 10.1 or lower version.And those tablets can not upgrade to Adobe Flash Player 11 or higher version when you try to install.With the low flash version,you open the browser to directly go to www.youtube.com to watch videos,it may stop working or the display stuck all the time. In those cases,we share this YouTube app v1.6.21 version.With this app,you can usually watch the YouTube videos smo……