官方教程在这里

Download a meeting recording

Only the person who started the recording and the meeting organizer can download the recording. Go here to learn more about downloading files or folders from OneDrive or SharePoint.

Important: If your org is still using Microsoft Stream to store recordings and you are a meeting owner or recorder, you can download a meeting recording:

• Go to the meeting recording in the chat history and select More options  > Open in Microsoft Stream.

• On the Microsoft Stream portal, select   > Download original video.

• Add the video to a Teams conversation by selecting Attach  beneath the compose box. Or share the recording any other way you choose.

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参考：Play and share a meeting recording in Teams (microsoft.com)