The server needs a better system for posting videos. The current one you need to upload onto something like youtube. I think we have be able to just drag a video from your folder just like a picture instead of copying a url. It will just make it easy for reporting hackers.
No support the server's resources would fill up quickly and cause longer loading times for slower internet connections for the forums. Deal with uploading to other sites we all have to.
Uploading images takes less time because the image file is smaller than most video files. Uploading a video here would make no difference compared to uploading it to Youtube.