This is a very US centric comment, but the format of the dates threw me off for a minute. I suspect you're a European company, so you use DD/MM/YY. However, if most of your audience is US, they'll expect MM/DD/YY. As a compromise, you could do Jan-18 or 18-Jan, or something like that... that was the very first thing that stuck out to me though.

Well, that and the small size of the interviews. I would like to see the interviews be a little longer. Perhaps you're planning on splitting a longer interview into smaller chunks, in which case, it might be nice to let us know what is coming down the line. If there are longer videos available to registered users (which it looks like there might be), it wasn't very clear how much longer they were or what other topics they covered. Perhaps you could post two times. One for unregistered (2:30) and one for members (45:00). Then you could have a breakdown of the topics, and show which chunk the unregistered viewers get to see.

Also, while watching a video my scrolling position would frequently change. If I was scrolled all the way to the top, it would scroll down (presumably to make the ad visible?). This was distracting. If you need to have the ad visible, you might consider relocating it next to the main video player.

I'd like to see more though... good luck!