Thanks to my colleague Marc Boes I learned how to show a YouTube movie in SharePoint! I want to share this with you :-)
Go to YouTube, click at Share and Embed, now copy this code. For example:
<iframe width="560" height="315" src="http://www.youtube.com/embed/1LN6O9jPdVE" frameborder="0" allowfullscreen></iframe>
Go to SharePoint and add a content editor web part. Click at HTML in the ribbon and choose Edit HTML Source. Now copy and paste the Embed line and save:
It is as easy as that :-) This is also works in SharePoint Online!
I got a tip from a visitor from NothingbutSharePoint with the warning that this solution won't always work. Check out his blog here: