You can simply download cloud meeting software on your phones such as Zoom, Skype, and Meet. You might be using your phones to attend online conferences and work meetings, here are some tweaks through which you can improve your overall experience and quality.
Use Your Phone's Main Camera
Most of the phones have a better rear camera than the front camera and most of the time they have better resolution. Using your rear camera will improve the quality as the rear camera has depth sensors, a macro lens, and many other sensors which improve the detail and brightness of the video.
Make Sure Your Phone is stable
You might need to stabilize your phone so the video is not shaky. You can do so by placing the phone on a tabletop or a tripod.