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obsninja
VDO.Ninja is a powerful tool that lets you bring remote video feeds into OBS or other studio software via WebRTC.
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
Check out this: https://github.com/googlecast/CastCameraReceiver
https://vdo.ninja/ Might have something helpful for this as well. Seems like you might be able to join a room as a participant, then cast that chrome tab. Would be a decent load on your computer as you'd be encoding, decoding, uploading, downloading, and uploading again.