HOW TO POST VIDEOS:
Step 1: Look for an embed code somewhere on the original video page, for youtube for example it's on the far right, and copy this code
Step 2: in the reply thread area click on the gray circle with the F in it and it will open a window
Step 3: Paste the embed code into the box that pops up
Step 4: Click 'Add Video'
Step 5: Delete the little image that says 'flash video placeholder'
**if your video does not appear, repeat the steps, it should appear in the reply box if it's going to work