Bandwidth for 100 participants at either SD or 720p

[Darren]

Greetings Zoom Community. I have a home based business and a big presentation coming up. As many as 100 participants. My internet speed is 325mb down and 100mb up, using ethernet. I am just trying to get a baseline on how I can use zoom with large meetings. Open to all suggestions, lower def video, more sessions, less people. It will be a meeting not a webinar. If someone could provide a basic rule of thumb (participants/bandwidth/video settings) that would be great Because it will be so many people, I cant do any real testing. 

[Darren]

Ok, after a little research, I will more than likely be using SD. All other details are the same. 

[storyhub]

IN HD mode webcams will be 640 x 360. Screen share optimized for video is typically 1280 x 720. Screen share not optimized for video will be at the screens resolution, which means that graphics on a 2K screen is sent over Zoom at 2K, graphics on a 4K screen is sent over  Zoom at 4K. The host webcam can be screen shared, then the camera is sent as 720P. Some cases will be changed by the capability of participants. So it is recommended to use HD mode on a Pro account.