OSS & Object Storage Service
Object Storage Service
https://en.wikipedia.org/wiki/Object_storage
对象存储服务(Object Storage Service,简称 OSS)
https://www.alibabacloud.com/help/zh/doc-detail/31817.htm
https://aws.amazon.com/cn/what-is-cloud-object-storage/
HTMl5 video & Picture in Picture
https://codepen.io/xgqfrms/pen/aewVNe