If you are clicking the orange “Tutorial” button at bottom right of screen but nohting ius happening, it is most likely because the page has not yet completed loading. Once fully loaded, click the same button and it will work.
Further, videos are hosted by Vimeo, on their website. If you ever see text indicating that the video is restricted for privacy reasons or similar, it is because Vimeo is having a confused moment. Settings for all videos have been configured such that they can be viewed by anyone logged in to SECTARA – if this is the case come back to the video later and you should be able to view it.