You may be able to add the video by uploading using this:Yeah, they love to destroy stuff if it is firmly attached. I attached some of that same cardboard onto the stand (I really have no idea where to get more, they are destroying it so fast)
Here you can see Pascal working hard minutes after I put it on. (i have no idea how to put the video directly into the post)
If you edit your post, the normal screen comes up above giving you options. If you click the 3 dots circled in red, the lower options open up.
The one circled in blue is for uploading videos. Some of mine were too large and wouldn't upload, but it's worth a try