There are 2 repositories under camera2-video topic.
Video Recording with Camera2 and apply video filter.
Peer to Peer video monitoring system for Android devices
DualRecord-Android is an Android library to utilize the multi-cameras on Android devices.
Audio and Video examples for Android
根据Google官方提供Demo,Camera2BaseJava和Camera2VideoJava合成的一个在同界面既可以拍照,也可以录像功能