See related link.
No. There are no websites that you can use for stop motion editing without downloading anything.
That's simply not possible. The ability to do anything online requires downloading information. Every website you view to do anything is downloading the information you are seeing before displaying it. In the case of watching a video you will always be required to download it. Streaming is simply a variation of downloading where you watch the information while it is downloading and than the temporary files you were viewing are removed from your computer when you are done. If you are not streaming or downloading, you do not have an internet connection and can not do anything online.
No you can not
The radio.
Going to Download.com and downloading MOV Downloader.
ANYTHING can give you a virus if downloaded. Run virus scans on the file before downloading.
NO!
*
Not possible.
no you don't
yes
You don't.