I only record/restream the 720p and 1080p streams from the MotoGP .com server so no, that wouldn't be possible at the moment. I might be able to set something up for Qualifying and the Race, I'll see what I can do.
I don't see 480p available on my stream connection, only:
1080p: Bitrate: 5.554mbps, Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc, Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
720p: Bitrate: 2.554mbps, Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc, Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
540p: Bitrate: 1.578mbps, Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 960x540 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc, Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
360p high quality: Bitrate: 1.214mbps, Stream #0:6: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
360p low quality: Bitrate: 794kbps, Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc, Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
Let me know which one you'd like to try and I'll see if I can get that stream set up.