That's interesting: a one-minute video that takes 5 minutes to play (assuming you mean 'play' when you say 'load').
This could be caused by a slow Internet-connection. So find a friend with a 100 mbps glass fiber connection and try again. Any ADSL or cable connection of at least 20 mbps should be fine for hd also.
What does the usual internet speed test say with you?
I have had my Series 7 for just over a year but am finding loading videos a nightmare. YouTube videos take an age to load and in HD i can basically forget about it!
Anyone got any advice or having the same issues?