I don't know particularly much about the other video upload sites, Youtube is the main one and most sites like this one are geared to using it.
A option for Youtube is to set the video to "Unlisted" which means your video will not come up in the youtube search results or on your channel either, Only those who know the link or you post it can view it.
You could also put it on a cloud storage like Icloud, Idrive just got to make sure your link allows people to view it.
As for editors there bunches of them.
Windows Movie Maker comes on a lot of desktops/laptops so you might already have it (or can be downloaded) and is pretty simple.
Avidemux is a free and popular video editor for simple cutting, filtering and encoding.
http://avidemux.sourceforge.net/
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