You do not need a webcam in order to join a Zoom meeting or webinar.
However, without a webcam, you will not be able to enable video. Things you will still be able to do include:
- view the other participants who are using webcams
- listen to the meeting or webinar audio
- view screen sharing
- share your screen (if this is enabled by the host)
- participate in breakout rooms, polling, chat, and Q & A (as long as those are enabled by the host).
If you would like to use your video in a Zoom meeting and you do not have a webcam on your computer or access to an in-room video conferencing system, consider using the Zoom app on a smartphone or tablet. The Zoom app for Android and iOS can use the native front-facing/selfie camera on a mobile device as a webcam.