The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Why would I choose EMAY over the other brands ? 1. No subscription or hidden cost to get all the features, this is the investment once for all. 2. No cellphone required to use. Just take the device out and get your ECGs recorded easily, all the readings will be stored on the device locally. Why is the 6L superior to the 1L ? 1. It's more sophisticated developed and provide heart data from 6 different perspectives comprehensively. 2. Algorithm has been greatly improved for higher accuracy & better perfomance. 3. Added features like ryhthms playback on the 6L device. How do I share the data/reports with my doctor ? You can take the device to your doctor's office and show them the readings & rhythms on the device in person; Or you can download the data to your smartphone/computer first, print it out or email the PDF reports to your doctor from the app easily. Can multiple family members share one device ? Yes, you can set up multiple users on the smartphone app, and sync the data to corresponding users on the app. The device itself doesn't separate users. Will my privacy and data being protected ? Yes, perfectly protected. All your readings are stored on the device locally, and after your data were synced to the app, they won't be uploaded to the internet, becaused there's no "cloud" feature, and the app is for offline use only.