One thing to know is that the ID you're supposed to provide is just a small part of the youtube URL. For example, if the full URL is
https://www.youtube.com/watch?v=4XopsFtdaLwthen the ID is just
4XopsFtdaLw
Second, though, is that I can't get them to work at all due to a security notification popping up. I get the same thing in either adventure or gamebook mode. The notification/error is:
SecurityError: Error #2121: Security sandbox violation: Loader.content:
http://www.youtube.com/v/4XopsFtdaLw?ve ... autoplay=1 cannot access
https://s.ytimg.com/yts/swfbin/player-v ... ch_as3.swf. This may be worked around by calling Security.allowDomain.
at flash.display::Loader/get content()
at com.google.youtube.swfproxy::SwfProxy/onRequestParameters()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at com.google.youtube.model::YouTubeEnvironment()
at com.google.youtube.application::WatchPageVideoApplication/createYouTubeEnvironment()
at com.google.youtube.application::VideoApplication/onLoaderInfoInit()
I don't know if this is a known issue. I also don't know if you're hitting the same problem...