1. The question is about recommending a YouTube channel for studying the calculation of deflection of beams using virtual work. 2. I am a math TA and tutor focused on math and physics concepts, and while I don't recommend specific YouTube channels, I can help explain the theory or calculations involved. 3. For studying deflection of beams using the virtual work method, you should look for channels focused on structural mechanics, civil or mechanical engineering, or strength of materials. 4. Some popular educational channels provide detailed videos on virtual work and beam deflection, but I recommend verifying the credibility and clarity of the content. 5. If you want, I can explain the virtual work method and how it applies to beam deflections step-by-step here.