The search engine at YouTube is only as good as the tags that are entered into it. People can upload a hundred videos of Glock 18s, but if they don't tag any of those specifically with the "G18" tag, then you'll never see those videos come up in a "G18" search. It's like sending a guy into a room full of thousands of DVDs and telling him to find you John Wayne movies, except none of the DVDs are labeled.