Correct - it is the default for the forum software Xenforo. I keep thinking of replacing it but I've no imagination and it's quite difficult to work out something representative in such a small icon.I think it’s the default for the forum software - XenForo.
Just WT in the style of a Western nameplate as per the Western Thunder banner at the head of each web page perhaps?
The short answer is you can't!How does one upload short video clips ?
Mike