Yes! You can use Grain to record Zoom Webinars and utilize the Grain features to capture, transcribe, and share highlights of these calls. In order to use Grain for webinars, you must:
Be the host of the meeting
Press "Record" with Grain
If you want to upload previously recorded Zoom Webinars, go to the 'Private Recordings' --> Scroll down to the 'Unimported Recordings' section --> Upload recordings from Cloud or Local Recordings Folder (you can change this folder in your Preferences under 'App' --> 'Zoom Recording Directory & Local Settings')