How do I embed videos into my site?

Easy way:
1. If you're using an online video that have an embed button, you click it and copy the embed code. YouTube will probably just have the code there on the right of the video. CLICK AND COPY THE EMBED CODE.
2. If you're using Wikispaces or another one of these kinds of websites, there will probably be an embed icon somewhere. Wikispaces' embed icon looks like this...
3. Paste your embed code into the dialog box that pops up when you click the embed icon.