Please note, all our videos and PDFs are downloaded from the Amazon server in a zipped (compressed) format. If you download to a modern computer, the videos and PDFs that you purchased are typically unzipped (uncompressed) automatically after download. On an iPhone, iPad, or other device, you will need to install an app that can unzip the video(s) and/or PDF(s) before you can view them on these devices.
For the iPhone and iPad, you can try the free app iZip to unzip your files, but there are many other apps that can do this. Check the App Store on your device to find one that works for you. On the iPhone and iPad you can then use this app to “Save the Files” to the Notes app for easy reference.