You can either set up the meeting to record automatically, or you can press “Record” during the meeting. The ‘Record’ button is usually located next to the ‘Share Screen’ button, but on small screens it may be hidden. If it is not visible with the other main controls, click on ‘More’ to access the record option.

It is recommended that you record the video to your local device. It is not recommended to record to the cloud, as cloud storage is not entirely reliable and may not always keep the recording.
When you Record to your local device, you need to select where the recording will be saved after you are finished the presentation. By default, there will be a Zoom folder created in My documents.