[ComplianceRecordingBot] Video stream is never subscribed

I built the latest sample code and deployed to Azure Cloud Service (classic). When I made a Teams video call from the non-recorded user to the recorded user (per "Test" section of README.md), the bot was correctly triggerred and it received audio sample callbacks. However, the video samples were not delivered, i.e. BotMediaSTream.OnVideoMediaReceived is never called.

I put more logging and found that CallHandler.SubscribeToParticipantVideo() logic never calls this.BotMediaStream.Subscribe(). here

As far as I read the code and put some additional logging, availableSocketIds and msiToSocketIdMapping are created as empty and they are not filled until a video stream is subscribed (and then unsubscribed). In other words, I don't find the locatin where socket ID is set and socket ID is never created.

Is it a logic bug of the sample code? Or, do I miss anything and should I investigate somewhere else why video samples are not delivered?

Start with the Test section of README.md and CallHandler.cs at SubscribeToParticipantVideo(), especially the logic around BotMediaStream.Subscribe() and the socket ID mappings. Trace why availableSocketIds and msiToSocketIdMapping remain empty, then verify that video samples reach BotMediaSTream.OnVideoMediaReceived during the documented Teams call.