How to blog a video-clip from YouTube.

Go to the YouTube site where you video-clip is.
Click on "compartir" and then on "insertar". Copy the embed code (código de inserción).
Then access this blog and click on "new entry".
There are two options at the top, left-hand side of the page: redactar and HTML. You generally use "redactar" to write a post. Click on "HTML" and, once there, paste the embed code of your YouTube video-clip.
Then go back to "redactar". You should be able to see your video-clip now.
Add any text you wish and publish your entry.
The questions about your video should be included in the same entry.
When your questions are ready, access blog, edit your entry and type the questions. Publish.

Good luck :)