Is it possible to send a video stream via PlainRTP Transport from browser?

I want to send a video stream to a remote server to be recorded. But it seems like overkill to create a webRTCtransport and then create a plainRTPtransport to consume a WebRTC producer.
Hence I was wondering if a PlainRTPTransport pair (client and server) can do the job without a producer spawned from WebRTCTransport.

If not could you explain why? Thank you.

No. The browser cannot send plain RTP. This is not something we decide but the browsers and the WebRTC spec. Also note that this is not a generic WebRTC forum, but you got your answer anyway.