self explaining question, lots of valuable info, but does not seem to be available.

in addition, originally a video and the powerpoint presentation were available, lots of valuable info in the PPT, I don't know about the rest of you, but watching a video is viewed as screwing off whereas the PPT is seen as research, lots of valuable info that is hard to extract from a video, why are the PPT gone?

are there any plans to make these available again?