It seems like I can only see YouTube videos in the threads...how can I fix it to see these other videos being posted?
There's an awkward way to get it. Right click the video box, choose View Source. When whatever opens opens, press Ctrl and F and search for the site name of where ever the video is hosted. Copy and paste the link.
That's an issue with the code, most videos didn't work with IE. Only solution I can offer you right now, is getting Firefox (I hate to say this)
if i "quote" the message i can see them...it's just with some posters. when i post a video, i can see them...