What I do is upload the video on youtube then once its done you can click the share button and it gives you a link. Then, I come to EBN and post a thread and click the insert video button (next to the pic button) and paste the url into that box and your video is ready to go
If you put it on youtube you can copy the URL address here or click on the video icon at the top right of the icon bar on here and then put to URL address there.