update video plug

Author: hjwp

video_plug.asciidoc

@@ -1,16 +1,16 @@
 [[video_plug]]
 [preface]
-Companion Video
----------------
+== Companion Video
 
 ((("companion video")))((("video-based instruction")))((("Test-Driven Development (TDD)", "video-based instruction")))
 I've recorded a 
 https://learning.oreilly.com/videos/test-driven-development/9781491919163[10-part video series
-to accompany this book].footnote:[The video has not been updated for the second edition,
+to accompany this book].footnote:[The video has not been updated for the third edition,
 but the content is all mostly the same.]
 It covers the content of <<part1>>.
 If you find you learn well from video-based material, then I encourage you to check it out.
-Over and above what's in the book, it should give you a feel for what the "flow" of TDD is like,
+Over and above what's in the book,
+it should give you a feel for what the "flow" of TDD is like,
 flicking between tests and code, explaining the thought process as we go.
 
 Plus I'm wearing a delightful yellow T-shirt.