Hey D - video clips? If so, you need to upload them to YouTube and then put the Embed Code of the video into your blog in the Source Code.
Once you've uploaded to YouTube you'll see it gives an embed code (meaning a code that allows you to embed a video onto another site)
Copy the code and paste it into the Source Code of your article (the code that sets up the layout of your blog) - you'll see the Source Code function in the top left hand corner of your article - it's the biggest button in the editor. If you have any further questions or get stuck in the process PM citanul and he'll assist you.