Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: what format of video does it play
Document: Order for my car since I was using my Iphone to play music, but when phone rings music stops so now I can continue to listen music on my touchpad not having to use my Iphone.
This MP3 player would be exactly what I wanted but has one major flaw that I don't like... it doesn't seem to have a "shuffle" function. I can't have the songs on the playlist play randomly. They just play in the listed order. Don't know how or why they forgot to include this functionality.
Very good price for the product. Holds a lot of songs and very easy to setup and use. However there are a few things I don't like. I cannot seem to find a way to play songs in random/shuffle order. So it always starts at the beginning of the list after an upload. Also, buttons seem very slow to react.
At first I thought it was ok beside  the fact of having having my songs play randomly. Then after a week of use, the audio blew out and only half of the of the song played through my headphones at first I thought my earbuds broke but then I borrowed my friends and it still didn't work. Overall I think this thing is pretty crappy.
After 2 months owning this junk, the files(music) suddenly gone. It will say no file found. When I plug it in my pc the songs downloaded can be seen..they won't just play in the junk MP3 player. Not only that, it scrolls really slow when you select songs or moving keys..etc. Save your money and invest on the real thing-Ipods. You'll get what you pay for.
My son (10 yo) likes his Coby because it packs music, video, radio, and camera in this amazingly inexpensive, small device. Of course the quality or the pictures is not the same as a high-end smart phone, but it's perfectly adequate for a kid to have fun with. The software is easy to use, and largely not even necessary since the device just appears as an external drive on your Windows machine, and you simply copy music, video, etc.
was very disapointed in coby mp3 player. cord that was sent with player did not fit. could not down load to my computer. will not buy another coby product.
very difficult to understand how to work this and load songs. bought for my son's birthday and it broke in less than a week. buttons difficult to respond had to push several times to work add a result bottom of screen got messed up and unable you see screen for videos now.
this is the worst! i can't even download the dang songs. take my advice... don't waste your money on this terrible product.
so other than the touch pad being almost completely non responsive, the slow moving menus, and the fact that your music will skip, this is the best mp3 player for under 50 bones. buy yours now!
Answer: It opens 3gp.. mp4 doesn't work unlessv you use a converter, which actually comes with the mp3 player