this application enabled you to take photos or record videos simultaneously from the two cameras - rear camera (rear) and selfie camera (front), with support for recording in the background.

works on specific devices that support it.
partial list:
Pixel6/7/8/9.
Samsung S20/21/22/23/24. A55. Tab S7/S8. series.

4K up to 60 FPS:
https://youtube.com/shorts/mNovD9tPIjM

new templates: solar ring, gems, portal and more.
https://youtube.com/shorts/cGyCZcBRT6I
https://youtube.com/shorts/U_bsbxSuOLY

new - full screen dual cameras matrix effect
https://youtube.com/shorts/s25pCRAmJk0
https://youtube.com/shorts/KoIbDcERLZM
https://youtube.com/shorts/2xc8AhDe9Io

new - templates:
https://youtube.com/shorts/094N3GH15f8
https://youtube.com/shorts/fkucL_yWI98
https://youtube.com/shorts/chI7EZqCdv8
https://youtube.com/shorts/UWes4sBmirQ
https://youtube.com/shorts/yFsy7F795uU
https://youtu.be/jBLqxAZZ4ck
https://youtube.com/shorts/8oKFP4wGNxQ
https://youtube.com/shorts/ewpZ3uGFFmY

driving to school
https://youtu.be/n3VcgPenbBg
2 steps recording in case your device do not support dual camera
https://youtube.com/shorts/y5awjhuwq-o
https://youtube.com/shorts/FsTEd9uYc0Q

go ghost yourself, position the phone between you and the TV.
capture video from main camera.
real time background removal from the second camera.
insert your self into live or TV scenes.
https://youtu.be/AyCpzYMizMQ

long press to change the second camera position.
pinch to zoom in or out -> this will cause the camera to change lens between wide/telephoto/wide.

tutorials:
https://youtu.be/nA0gm_tzEDI
https://youtu.be/BwCSoEGJMTI
https://youtube.com/shorts/odvYO879lQ4
https://youtu.be/gFtPoEM0QD4
https://youtu.be/_E9KZ2I0SeU
https://youtu.be/yMkCaYige5s

Landscape
https://youtu.be/FiXUb9ob--8

action camera:
https://youtube.com/shorts/JUGipcU3L2Q

This application is able to use the front camera and the rear camera of the phone simultaneously. So you can take photos or record videos simultaneously with the front and rear cameras.

Convenient to manage video files: you can easily play or delete all recorded videos. Also you can share video with WhatsApp, Tweet, Facebook, Instagram, YouTube, WeChat.

mostly free.

permission needed:
camera - to capture videos.
audio - for the videos.
location - only when you want to add GPS water marks.

Dual Camera Video Recorder