Videos are left in the FB group for 1 month. After that, most of the videos will be removed to get ready for the next month’s training. You’ll always be able to access previous month's videos by logging into this member portal.
99% of the time this is due to your internet bandwidth/speed. All of the videos are uploaded in HD. So if the video keeps stopping, try downgrading the quality of the videos by clicking on the gear settings icon (bottom right of video) and changing it to 540. You can also wait until the whole video buffers before watching it.