Nope but you can post links
Not sure if you're asking if this can be done, or if you want WikiAnswers to do this. I'm pretty sure WikiAnswers can't do this. Educational videos demonstrating heterosexual intercourse are available from health professionals.
Wiki Answers is not a video sharing site.
No, you cannot put presentations on WikiAnswers. However, if it relates to a question's answer, you can post a link in the Related Links section of a question, but you can't put it right on WikiAnswers.
Video ads are currently on WikiAnswers next to some answers to questions, but they can be played at your discretion, and do not play automatically when the page loads.
WikiAnswers is an ad driven site for many reasons. First, if you look at an answer, to the right of an answer there is most likely a 'video partner' ad, which shows WikiAnswers' video partners. Rarely, there is an ad banner below your navigation bar on certain WikiAnswers pages.
No you can not.
Yes, WikiAnswers has video ads, but they can be played at your discretion, and do not start playing on their own. They can sometimes be found on the right hand side of an answer to a question. You can click on it to play the ad, but it does not play involuntarily.
Yes. Anyone can read and answer the questions on WikiAnswers.
WikiAnswers cannot display pictures or videos. Try a video search engine.
You can find videos that show information about WikiAnswers on YouTube. If you type in WikiAnswers in the YouTube search box, you will most likely find a video that shows about WikiAnswers. WikiAnswers has a YouTube channel, so you can see many other videos related to WikiAnswers, too.
I'm afraid so. Some people can't be trusted. Vandals put bad answers on WikiAnswers.
Not in wikianswers for sure =) Wiki, myspace and MTV