Potato is an original video with no subtitles.
Tudou can provide downloads, but the first video network doesn't, but you can try to find it in the IE cache folder (you must read it before you can have a video cache).
A method for obtain video without providing download,
Open the IE tool selection option, select the setting point in the temporary file to view the file, click the size video in front, play the video format, and you can install Baidu video or other videos to play.
hope this helps