Alibaba Cloud Content Delivery Network (CDN) provides video management features that optimize bandwidth usage, improve cache efficiency, and give you control over audio and video delivery.
Optimize bandwidth and cache
[Object chunking](https://www.alibabacloud.com/help/en/cdn/user-guide/object-chunking#task-187634) — Retrieves content from origin servers using HTTP range requests, increasing the cache hit ratio, reducing the amount of data transfer during the back-to-origin process, and reducing the response time.
[Audio extraction](https://www.alibabacloud.com/help/en/cdn/user-guide/audio-extraction#task-1664445) — Extracts and returns only the audio data from a video file, without delivering the full video stream to clients, reducing bandwidth and data usage.
Enable playback controls
[Video seeking](https://www.alibabacloud.com/help/en/cdn/user-guide/video-seeking#task-187634) — Lets users seek to any position in a video or audio file without compromising playback quality.
[Audio or video preview](https://www.alibabacloud.com/help/en/cdn/user-guide/audio-and-video-preview#task-2310777) — Delivers a fixed-length segment of an audio or video file to clients instead of the full file. Use this to implement content previews before a user authenticates or purchases access.
Protect content
[M3U8 encryption and rewrite](https://www.alibabacloud.com/help/en/cdn/user-guide/m3u8-encryption-and-rewrite#task-1938061) — Rewrites M3U8 files that are transmitted over HLS. You can use custom parameters to rewrite M3U8 files.