Thank you so much Linda! The video's didn't work at all with Opera but video's 1, 2, and 4 worked with Internet Explorer. The problem was I was trying to view the video that came up when the page loaded, video 5, I didn't try changing the video number.
This does look like it's worth trying if I had a 1/2" drill, lol. I wonder if it's easier to remove the moss if you put the drill in reverse?
Thanks again Linda for your help.