Autoplay On Music Playlists Doesn't Work Anymore - Please Help

There are a few things that may be preventing you from using the autoplay feature. The first one is to make sure your internet connection is okay. Sometimes, a video will not continue playing or won't start playing if your internet connection is too slow. You should also make sure you have the newest version of Adobe Flash Player downloaded on your computer. lAstly, make sure that the videos in the playlist do not have a "playback restriction". Playback restrictions can be implemented by YouTube when a copyright holder or content creator decides that a video they (owners) own should not be allowed to playback in playlists. Many times, a message will appear saying that "so and so has restricted playback of this ideo and this video must be played in a standalone player".