* [go-mp4 v1.6.0](https://github.com/abema/go-mp4) – Go library providing low-level read/write and box-level parsing/building of MP4 files. * [xgplayer v3.0.25-alpha.1](https://github.com/bytedance/xgplayer) – Web video player library with detachable UI, staged MP4 loading, and FLV, HLS, and DASH live/on-demand support.