It's gonna sound cheesy BUT it really is as easy as 1,2,3.

You 1st have to have an account. (free)

Once you have an account there will be an option that says Upload video.

1) you click on that (Upload video) and fill out the info. as far as name of your video and tag lines (meaning words in relation to your video that people will put in order to find your video)

2) Once you fill that out you click continue

3) There will be a 'Browser' button just like the one to upload pictures here on Saddos all you have to do is find the video on your PC click it and it will load automatically.

The time to upload will depend on the lenght of the video.
Thats it.
Simple really.