Take the memory card out of the Cam and insert it into a card reader.
There should be one or two folders (usually one). The one folder should contain both the pictures and videos.
The pictures should be in .jpg (most likely but it can be other formats) and the video... probaly .avi, not sure. To play them in a different player, right click it and then select "open with" and just select your favorite video program.
If you want to upload the video to youtube, just go to the upload section of your youtube account and just browse for the video you want to upload. Thats it.
To upload the pictures or share it, just drag the picture out of the card and do w/e you want with them.