For the best compatibility and reliability we recommend using MP4 Videos using H.264 encoding and AAC audio.
If you have been provided with other video formats and wish to convert the video there are a number of free and reliable solutions that can do this.
Two notable options are:
1. Freemake Video Converter: http://www.freemake.com/free_video_converter/
Simply add your video to the main screen then press “to MP4” along the bottom. For the output option simply use same as source and confirm that it is using AAC audio and H.264 video via the readout on the right highlighted below:
2. For Mac Users Miro Video converter is a great option. http://www.mirovideoconverter.com/
Simply use the iPad format to get a properly encoded MP4 file.