video quality

[Uliop]

I am conducting a meeting with another participant, and both of us are using an iPhone as our camera. During the meeting, the video quality is excellent. The session is recorded. However, once the meeting has ended and the video is converted, the quality noticeably decreases. Could you explain why this occurs? I would like the video quality to remain at the same high level.

[storyhub]

iPhone camera resolution on Zoom is going to be 640x360 max.

[Uliop]

Thank you for your answer. But why is the quality excellent during the meeting?