This is an easy tutorial to download almost any video on the web using the web browser Safari. This should work with almost any video. I will be download from youtube as an example.
Step 1: Safari
Step one is just to make sure you have the most recent version of Safari. You can download it here:http://www.apple.com/safari/
I will be using Safari 4 but Safari 3 should work fine too.
Step 2: Opening
Open up Safari and go into the window tab. Click the button that says "Activity"
Step 3: Video
Next navigate to a window with a video on it. The Activity window should change. Look for the file on the list that is large (in megabytes) and if the video hasn't fully loaded then it should say that only a certain amount of megabytes have loaded (ex. 4 out of 6)
Step 4: Download
Double click on it and it should download.