Update: I finally did manage to trim a video to about the time range that I wanted, only to find that the trimmed video has ONLY THE CAMERA FEED, and NOT the screens I was sharing. This makes the video useless to release to students. Fortunately, I did download an original copy to my computer before trimming. I guess I will have to play the downloaded recording and re-record it in real time by sharing the screen and computer sound. But that's going to waste a lot of time that I really can't afford.
ZOOM - Are you listening? PLEASE, PLEASE, PLEASE -- Give us back the ability to set a playback range. If you want to offer the Trim feature for those who want to use it, that's fine, but please restore the former functionality as well. With the playback range, I can immediately "proof-watch" the video and adjust the sliders if I don't have the start and stop times quite right. And I can see my results immediately. With the Trim feature, you have to wait a long time to see the results of your trimming. And if you've trimmed too much from your video, you're going to have to restore the video and start all over. I'm sure the Zoom developers meant well, but this new feature is NOT an upgrade.