Starting from Q3 2011, the RadEditor for ASP.NET AJAX gets a new dialog - Insert External Video, which provides the ability to easily embed a YouTube or a Vimeo stream providing just the URL.
Steps to insert a video:
The dialog can be tested in the following Q3 2011 demo: Dialogs.
If you would like to see support for other streaming video web sites, please post them. Note that only sites that support embedding video on other pages can be supported.
Stoyan Stratev is a technical lead in the Windows 8 HTML team at Telerik. He joined the company in 2005 as a web developer, specializing in the integration of the Telerik components in third-party solutions, such as DotNetNuke and SharePoint. He led one of the ASP.NET AJAX teams before moving on to the Windows 8 division.