Thread:PlasmoidThunder/@comment-27442027-20160205200703/@comment-3495717-20160205205943

Elaborating on Doom's response, you haven't added ?list=PLAYLISTURL after your switch function. What this means is that the following URL is being processed:

https://www.youtube.com/embed/vS_a8Edde8k&feature=player_embedded&loop=1&autoplay=1

Because of the way YouTube's URLs work, the first additional parameter must begin with ?, with subsequent parameters starting with &; excluding the ? will prevent the video from displaying properly, which is what is happening here.

Now let's take a look at the URL for my Message Wall YoutubePlayer:

https://www.youtube.com/embed/-EChc5FhL6s?list=PLsyGrureB8Ip1HKdryUy8OASzcn5-c2aV&feature=player_embedded&loop=1&autoplay=1

You'll need to create a playlist on your YouTube account, put the videos you want in there and put the playlist's URL after your switch function, as explained above.