When I started too, I used URL, but as you, found it about worthless. Never seemed to work well at all.
FTP works better, but isn't perfect either. I'll check out the all day video once in a while and see it skip hours here and there. The only thing that made it any better was to only update every three or five minutes - forget what I set it at. Seems that updating every minute made things worse on the all day video.
Maybe they decided to change it like the WunderMap, and just forgot to tell us...