Again you need to get that looked at - it sounds like you have some dodgy cabling in your building. I get 6MB/s download speeds from my Netvigator pretty consistently.
I don't know about you, but in the US (big cities like NY and LA) 100/MBPS is the standard via coax cable. So yeah, 6mbps seems rather slow when compared to that.
You need to get that looked at. It should be more or less DVD quality.
Sounds to me like you need to get your DVD player looked at my friend.
I see lots of dithering and scratchy edges on all channels. I know it isn't my system because it is the same at my friends places and at the TV stores. Why do you think all Electronic stores use DVD feeds to display their TVs? If they used the regular cable signal people would think the TVs themself suck!
Not to mention that in order to display the guide you need about 15 seconds each time. It also gets very convoluted when the days switch over.
I'm not wanting to get into a pissing match my friend. I'm sure the TV and Internet have advanced lots in the past few years. I'm simply saying that if you are coming from NA you will be very dissapointed. Its kind of like going from High speed internet to dial up, it is very hard to go back in technology.