There’s a thread running on answers.microsoft.com about this subject. Someone has just posted a link to the beta release versions for Teams (all flavours not just macOS)
Here it is:
https://raw.githubusercontent.com/ItzLevvie/Microsof...
For rhe versions built for Apple Silicon need to look out for
osx-x64 + osx-arm64 in the release note.
The latest beta version, as of a few hours ago is thus:
1.5.00.13703 (osx-x64 + osx-arm64) - published on Tuesday, May 17, 2022 at 4:41 AM with 204 MB:
https://statics.teams.cdn.office.net/production-osx/...
Which appears at first glance to have resolved many of the video artefacts folks were experiencing with the earlier beta builds.