Here are some tips on how to play supported videos on your AAXA P2 Jr Pico Projector.
There are many types of codecs for AVI and MP4. So even though a file may say it is an AVI or MP4 extension, it may be using a codec that the projector doesn't recognize.
Please try the following:
Go to Format Factory and download the converter application. We have had great success with this free and lightweight conversion program. Use it to convert your video to AVI and that should do the trick. If it does not, it may be because your video is too big and you can try a smaller resolution for your projector. Your USB or SD Card must also be under 16GB in size.