A small team of colleagues has begun to explore how to include a count-down timer into large Zoom meetings, which always rely on a powerpoint, and include hundreds of participants. The idea is to do this without changing to an entirely different platform. I am aware Brightcove streaming platform comes with the count-down timer embedded. Although I have a demonstration of how to set up a timer within a powerpoint, the countdown is only for a short time. The count-down timer that we envision would need to be operative for a minimum of 20 minutes, preferably for up to an hour. Thank you.