Let the hive mind of Engadget get that for you.
"I need help! I want a small pocket camcorder but I'm not sure which one to get. I don't want to fall into the hype of the Flip because I worry two hours won't be enough. What should I be looking for when considering a small camcorder and where can I get a good quality one with expandable memory? Thanks!"
Do you have your HD TiVo hooked to TV via HDMI-DVI cable? Can you check in the system settings and see if it says HDCP enabled? I am guessing the moviebeam requires HDCP not HDMI. It is easy to say HDMI since I am pretty sure all HDMI devices shipped with HDCP. Where as there were a great number of DVI devices (including computer monitors still) that shipped lacking HDCP. HDCP is the encryption carried over DVI and HDMI. DVI and HDMI are the same connector other than the addition of audio, that is why a simple DVI-HDMI converter exists, all it is doing is rearranging pins and shape.