Hello there,
First and foremost, I hope you don't mind me reaching out to ask you something.
 I've never done this and I don't know what a wall post is. Just trying to figure out if there is a private way to message someone and I can't seem to find one. If you know of one I would love to know.
But I have a question. How do you upload a video?
If I saw a video on reddit and wanted to share it, despite not being the owner of the video, if I did upload it and if I copied and pasted what has been said about the video and credited the person who said it and gave the link I got it from, would that be okay? Like I don't want to do anything wrong by uploading someone else's... footage... work? Lol... I mean I'm sure that's what most people do. Upload videos that are not theirs.

Also if you could tell me anything about how one uploads,  it would definitely be appreciated.
Again I'm sorry to bother you, just looking for answers and hoping you may be able to help.