Steps for embedding a video from youku/tudou:
(The embed block works on a random basis, so I suggest we don't use it. There is a failure example at the bottom of this post. )
Insert a code block
Copy the "General Purpose Code" from the share link below the video.
Paste the Code.
Modify the title if needed or delete it.
The tricky part is the video will not be visible until you save the changes and log out, and then visit the page as a public visitor.
From Youtube:
An Embedded Block from Tudou
A Code Block from Tudou
Youku Code Block
youku Code Block
Embed Block from Youku