Upon launching ReadCube you may be prompted to give "embed.wistia.com" permission to store information on your computer.
Wistia is the name of the company who hosts our videos. It is 100% safe to allow them permission to store information on your computer; this will simply enable our videos to play without interruption.
If you have any further questions about this, please feel free to reach out to us at support@readcube.com