The video files (called MP4 files) will play on 95% of computers/laptops using the media player that is already installed on them. If you have earlier software or an older computer that doesn’t have a media player, you can download one for free.
VLC media player (free) VLC Media Player-  http://www.videolan.org/
Apple Quicktime - http://www.apple.com/quicktime/download
Windows 7 can sometimes have trouble reading MP4 files, but if you download a new free media player that will solve the problem. Once installed on your computer, you should be able to view the videos.