What is the "replay tool"?

@john_drivenupthewall,

In another topic I started, I successfully recorded a portion of my screen in a video that ran slightly less than a minute. I then used the upload tool. I was expecting it to embed in the post, but it uploaded as a link - which readers had to download to watch.

I have seen many small screen capture videos embedded in forum posts and I’m now wondering how to do it. Could it be as simple as file size? (Mine was roughly 2MB) … and a smaller uploaded video would have appeared embedded in the post?