No, that's not the problem. You can modify your own post and cancel the recording and put in another one. And you can modify your comment on a video, as well. The problem is how to notify when you've got a new post. Like Candlelight said, it won't result in either "show new replies" or "show unread posts".
I'm not sure if I still understanding, but there is the notify button on each thread. The website will send an email alert each time someone puts up a new post. I don't think that's what you mean though.
But that's exactly what I mean! If I modify a post, will that really send out a "a new reply to your post"? Because it it does, that solves the whole question. well, almost.