Douyin payment. A credit card, also called a credit card, is a credit certificate issued by a commercial bank or credit card company to consumers with qualified credit. Douyou in the credit card bill is the user's payment information for the Douyin platform. Douyin is a music and creative short video social software incubated by ByteDance. This software was launched on September 20, 2016. It is a short video community platform for all ages. Users can choose songs through this software and shoot musical works to form their own works.