Vimeo's Hubnut widget is Flash based, which is great for desktop but not supported in mobile devices - never on iOS, and no longer on Android.
With the rise of mobile and Steve Job's desire to break Flash's grip on video,
http://edition.cnn.com/2011/11/09/tech/mobile/flash-steve-jobs/index.html there is no longer an easy publish-once-play-anywhere option for video distribution - at least not a publish-one-file option.
For Mobile devices, there are a number of free HTML5-bsaed players you could try out, which can work on most platforms with no more than two published output files per video. This might help you get started.
http://praegnanz.de/html5video/