The reason is that the URL which you now get from YouTube seems to be different from the one that Jeff shows being used. This means that the link you copy from YouTube doesn’t immediately work in a CMS 6 R2 site . You have to change it.
To get the correct ULR, follow these steps:
Go to you YouTube channel and make sure that you have at least one playlist in the right hand area. If you don’t, you need to create the playlist, then go to the “Videos and Playlists” button and ensure that the playlist has a tick box next to it’s name as seen below.
Once the items are showing in the playlist, click the “more info” link below the playlist name, as seen below
This will change the right panel to show the items in the playlist. Once again, you have to click the More Info link, illustrated below.
This will take you to a new page where the items in the playlist are shown, along with the playlist URL, highlighted in the image below.