pH7: You are right, I guess, it's kind of strawmanning. It is however more likely that you'd have taken the precaution of installing an anti-virus solution than flashblock, wouldn't you say? Anyway, the point I'm trying to highlight, rather than argue this particular instance, is that I don't think it's unreasonable to expect a little more from those who only post links. It's in everyone's interest (except those less benign).
If it isn't unreasonable to expect a little more from those who only post links, then what exactly are you referring to by "little more"? What else should they do?
The only good answer I can think of is that you would want the person not to necessarily describe the contents of the video, but to write out the answer even if the video gives the exact same answer. This is why I wrote what I wrote above concerning posting links without accompanying explanation.
If you ask for help and only want the answers in a certain format, then say so in the opening post when you ask the question. But to complain about the way someone decides to answer is discourteous. If we are going to bring courtesy into this, then is it a little discourteous for someone to not type out the answer and to instead just post a youtube video with the answer? Yes. Is it just as discourteous or more discourteous for the asker to get upset about the format of the answer even though the asker didn't specify in advance the type of format wanted? Without a doubt.
If you're expecting courtesy by the repliers then the repliers can expect similar courtesy by the poster. If you don't like the format the answer is in, you should have said so in advance. Ignore the answer and wait for someone else to explain it to you, or ask politely for the person to explain the contents of the video. But to complain about a valid answer because it isn't presented to you a certain way is more discourteous than someone posting the answer in a particular format when it was never made known that the particular format wasn't wanted.
Courtesy is a double edged sword here. In my opinion, it hurts the OP's argument more than it hurts the other side. OP is the one asking for help. He should take the initiative and be understanding. The replier had no way of knowing that the youtube link was going to be perceived as discourteous.
Thus the courteous thing for the OP to do would have been to (a) ask for clarification of the contents of the video, (b) explain politely at any point that blind youtube links aren't what he wants, or (c) just ignore the poster and wait for another person to answer. Instead, OP choose (d), which is to reply rudely and complain about something that no one could have guessed in advance would be a problem. OP is in the wrong here and more discourteous than the replier.
pH7: It's not only the OP that might click that link but everyone else reading the same thread, and you don't know anything about their abilities to "x out of it" etc. I try to teach my children not to click such link as this:
http://www.youtube.com/watch?v=l1UQ9vKm_ig - even though you know you should hover over the link to see where it actually will send you before clicking (which, incidently, was worthless on older IE versions; too easy to falsify), it only takes one wrong click..
When you know how, it's easy to make every single site on the net safe to visit, given that you don't scar easily; that's not the issue. It's about showing others the courtesy of not assuming that they are constantly prepared to deal with the less pleasant sides of the 'net.
How does just posting a youtube link not show others the courtesy of not assuming that they are constantly prepared to deal with the less pleasant sides of the 'net?