CMS Dashboard > editable content with iframes?

I would like to embed some of the WPMU movies into the Wordpress Dashboard for one of my client websites.

I tried the plugin Dashboard Notepads (http://wordpress.org/extend/plugins/dashboard-notepads/) but iframe tags are stripped out.

I'd like to use the Custom Content Dashboard widget (https://premium.wpmudev.org/project/custom-content-dashboard-widget/) but this site is not part of a multisite.

Can anyone recommend a good Dashboard content widget whereby I can insert iframes?