Dropbox.
for $99 per year you get 1 TB of space, i think my laptop HDD is less that that, so i think its more than plenty. But if u sell too many videos or if ur videos are big, like over 1GB per video, then u might face a problem that u will have bandwidth limit of 250 GB per day, so if you video is 1GB, then if you send more than 250 videos per day, dropbox will block you for 24 hours i think. Then u will be able to send videos again. Thats the only bad thing i found out about dropbox
Google Drive.
They give 15GB free space, price per 100GB is about $2 per month, or $9.99 per month for 1TB, no bandwidth limits but you can't pay in advance for the whole year, that was the minus for me, coz i don't want to be billed monthly.
Projectmaenad.
Love it very very very much, free, lots of space, no limits, fast download and upload but guys can't watch your videos online (since some just don't want to save them on their device for privacy issue), and can't download your videos on mobile device like iPhone or iPad.
ManyVids haven't tried yet so can't say anything