Unfortunately, it looks like the episode that you are trying to watch is currently unavailable due to copyright takedowns. Luckily, you can still watch this episode, but you'll have to download it from another source, such as YayPonies. Here's some links to start your search:
If you have found a working mirror hosted on DailyMotion, or are willing to host the video yourself, please contact evert@lunasqu.ee to have your video added.