How to limit the size and number of downloaded video and picture

Hi

I would like to avoid that my member download tons of huge pictures in ES or EB.

Can I
1. prohibit the upload of any video
2. limit the number of pictures
3. limit the size of pictures : if the size is above the threshold, is a kind of 'max size of your pictures is xxx octets" message is displayed
4. limit the size of pictures : if the size is above the threshold, the system resize the picture and upload it.

Thanks
Henri