You can use your phone camera if you're using one of the following devices:
Xiaomi Mi3 and Mi4, Redmi, MEIZU m2, Lenovo K3 Note, Motorola, Micromax Canvas4 Plus A315, Xperia Z1, Samsung Galaxy S8 and S8 Plus, Huawei P10 and P10 Plus, Motorola Moto G5, Moto X, the Moto X Pro, Moto Maxx, Moto Turbo and DROID Turbo.
You can also scan the QR codes with any app with a QR code scanner, such as:
Step 1: Tap on your icon to go to your personal page, and tap through the icon that looks like a QR code at the bottom right of the page;
Step 2: Swipe right to the built-in camera scanner;
Step 3: Hover your cursor over the button below your video on our webpage that says "Enjoy it on your phone";
Step 4: You should see a pop-up that generates a QR code unique to the video;
Step 5: Scan the QR code with your Twitter QR code scanner, and press "OK" to watch the video when the URL is extracted from the code;
Step 6: Watch the video.
2. Snapchat (refer to this article for details: https://scanova.io/blog/blog/2016/11/30/scan-qr-codes-using-snapchat/)
3. WeChat (under "Scan QR code")
4. Opera Mini
5. Google Now on Tap
6. Samsung Internet
For more information, see this article "List of smartphones and apps with inbuilt QR code reader": https://scanova.io/blog/blog/2016/03/11/inbuilt-qr-code-reader/.