Does a class 6 sdhc improve video quality?

So I'm wondering if a higher class sdhc card improves video quality, right now I have a class 2 and when I play back my videos on my PC they look like crap but when I play the video back on my camera they look clear like 720p should look like can someone help please my camera is a coolpix l810
>>> Does a class 6 sdhc improve video quality?

Nikon coolpix l810 video/picture quality help?

First off sorry for my punctuation. Can someone help me I'm having video quality problems every time I play the video back in my computer the quality looks like crap but when Im recording it it looks clear like 720p should look and when I take pictures on the preview screen the pictures look blury But on my computer they look clear I don't know what's going on? I read an answer on another post that said that it may be the SD card that is has to be like class 6 or 3 I forgot I don't know what I have now Its an 8gb gigawear and it has a 2 on the bottom right I'm guessing that's the class of SD it is CAN SOMEONE HELP ME PLEASE???
>>> Nikon coolpix l810 video/picture quality help?

Benq gh600 or nikon l310?

Which one is better? which one has better quality?
>>> Benq gh600 or nikon l310?