My Samsung Note 8.0 is able to play some MP4 videos that I created earlier but some do not play and give an error message "Sorry, the video cannot be played. I created a new video with two different tools to convert a DVD into an MP4 file and with both tools I get that same message. However, that same MP4 file does play on my Motorola Xoom with no problem. Some MP4 videos play fine on the Note but others do not. The ones that do not play on the Note do play on a Xoom. Any thoughts on how I fix this so all the videos will play on the Note?