NOTE!! You'll need to SAVE the images that you find to your computer before you can ADD them to your page.
Strive to get a VARIETY of images/videos that demonstrate the meaning. Having a variety will be the most helpful to your classmates. If your images/videos are all essentially the same, then everyone will have a narrow idea of the word's meaning.
Here's how to find appropriate images/videos.
Probably the easiest approach is to go to Google Images and search your word.
However, that may not always reap the results you need.
Also, try searching synonyms for the word you've been assigned.
You can also look in Google Videos and in YouTube for videos.
Lastly, consider whether or not you can think of a specific person, place, thing, movie or TV scene/character that would successfully demonstrate the meaning of your assigned word and look specifically for that.