My camera lens has sand in it?

It works really awkwardly.its a Nikon S3100.so at first it said lens error then it started to work but then when I closed it it wouldn't turn off properly i mean the screen shuts down but the lens doesn't go all the way.so should youtube be my friend? should I clean all the dust from the parts of the camera lens? it seems to work since I can still get it all the way.

См. статью: My camera lens has sand in it?

Nikon P510 won't let me upload videos?

On multiple occasions I have shot some videos and then tried to upload to various sites such as youtube and Facebook. However, when I try to upload them, there is always an error? The videos work fine are perfect quality, but I can't seem to share them anywhere? Please help!
Added (1). Hi Jim,
I already am, I connected my camera to my computer and they saved fine.

См. статью: Nikon P510 won't let me upload videos?

Is a Nikon Coolpix S4400 and nikon coolpix S2750 good for modelling shooting?

I want to know before buying one of them.

См. статью: Is a Nikon Coolpix S4400 and nikon coolpix S2750 good for modelling shooting?

Is the Nikon red coolpix l820 digital camera good?

I know nothing about the cameras but I want a nice digital looking one to take good pics with then just like a phone camera or something I love taking pictures and someone recommended it to me. Should I go for it? How much does it cost?

См. статью: Is the Nikon red coolpix l820 digital camera good?