When you upload a video to your library, it will be transcoded into one or more different video streams that allow your video to be optimally displayed on different browsers and mobile devices.
If you want to decide which specific encoding settings that should be active for your account, this is a guide on how to get that done!
If you, as a user, have access to multiple accounts, you can copy movies between your accounts. The selected movie is copied to the specified account and recoded in the usual way according to the
Is there a way I can create an entirely new Encoding Profile?