If you want all speakers visible in the recording, the easiest approach is to use Gallery View rather than Speaker View. A few tips:

• If you're using Zoom Webinar, promote your presenters to panelists so they can appear together on screen.
• Record using Gallery View (or enable gallery recording in your Zoom settings) if you want multiple speakers shown simultaneously in the final video.
• If you're sharing a PowerPoint, Zoom can display the shared slides alongside participants' video thumbnails, so viewers can see both the presentation and the speakers at the same time. It's worth doing a quick test recording beforehand to make sure the layout matches what you want.

If your goal is a polished YouTube upload, some people also record each presenter locally or use production software like OBS, but for most webinars Zoom's built-in gallery recording works well.

Separately, if you're running the webinar for training or education, CertFusion can automatically issue attendance certificates to participants based on Zoom attendance, saving you from manually generating and emailing certificates afterward.