DVD Recorder only recorded the audio
 

I have a Toshiba D-R400 and I set the timer to record Saturday Night Live last night on NBC-HD, and it only recorded the audio.

I've recorded HD content before, from broadcast networks (but not NBC) and satellite stations, and have never run into this problem. I tried taping something in HD this morning and that got both video and audio.

So I guess my question is, does NBC flag their HD content and prevent it from being recorded (I was in SP mode)? I can't think of anything I did wrong, since I managed to get the audio recorded from my satellite receiver, just not the video.