Performance Testing Video Contents

Hi All, 

I'm tyring to do a browser level performance testing using HP TruClient protocol. The application is flight information display system which plays  a static (Single) video (.mp4) when it is launched. For validation - inserted TruClient functions (Verify) to check whether the Video player is launched and now am looking for options to capture the File download size of the mp4 file ? please let me know, is it possible to do using TruCleint protocol and the steps.

Thank you.