If you upload it to youtube, it's very simple to transfer it here. Once the video is published, you bring it up on the page, click SHARE under the photo, when that jargon comes up...click on EMBED...then you must copy the link that comes up...highlight it and hit copy. Then you simply come to the reply area here and paste it into the reply as a link. It will show up as a ready to see video if you do that.
That information is if you are using a PC, laptop, etc. I don't know anything about pictures and videos on phones. I don't own a smart phone so I have no idea how that system works.