Addresses Comment 395 from Wayne Dick (partially accepted):

https://www.w3.org/WAI/PF/Group/comments/details?comment_id=395
Accepted:  editorial changes to TVD-1 and TVD-2
Rejected: Did not apply same changes to section on Extended Video Description since applying visual formatting markup to audio content is not possible.   Changes to Transcript were addressed when processing comment 392
https://www.w3.org/WAI/PF/Group/comments/details?comment_id=392