The bottom line is your camcorder recordeds stuff in a format that isn't compatible with the formats you can upload.
You need to open or import the camcorder files in a program that can then export or save them into other formats.
I don't know what software you have available so I can't tell you which program you already have till do what you want.
You might get more helpful info if you could tell us what the file ending is of the file (as in filename.AVI or filename.MPG or whatever it is) you want to upload and a list of video editing programs you have on your computer. Otherwise any number of us can tell you how to do it but we would likely be explaining how to do it on software you don't have and it would be pointless.