A survey from Knowledge Networks shows that users are getting quite accustomed to advertising on online video. Results show that 80 percent (up from 67 percent in 2006) of network TV video downloaders favor ads in exchange for free video, while 69 percent of streamers say the same. Streamers have a significant distinction, however. The 69 percent report either watching a pre-roll ad or doing something else on the computer while listening to the ad.

Chances are, you've done the same: open a tab to watch a video, click back to your other tab while you hear the ad, then click back over again once the video starts. It's a solid argument to think about your video's audio message just as much as the images. That includes compelling copy, pleasing background music and saying your website, brand or product out loud, repeatedly.

Pre-roll advertising for video is here to stay and the survey results suggest that users are resigned to that fact. And that's a good thing for video marketers and advertisers. Just don't forget to keep the multi-taskers in mind when you record the audio.