I'm not sure it's possible. You can read
this to get some more information about what's going on. It refers to Java, but the same principles apply. I'd especially take note of the response that gives an example using curl. The same thing could be accomplished in BrS, but it would take some work and still might not work for a video.
-JT
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.