Changelog for Rule: `video` element visual content has description track

Date	Description	See Changes
Dec 03, 2020	This rule applies to... (#1506)
Aug 24, 2020	Order authors alphabetically (#1424) * Order authors alphabetically * Add note in design document
Jul 07, 2020	Use technically correct language for attribute values (#1352) * Create definition of attribute value * Use new def in rules
Mar 20, 2020	Mapping rules to WCAG techniques, batch 3 (#1225) * Add rest of mappings to techniques
Mar 11, 2020	fix: spelling of `acknowledgment` in rules frontmatter & update… (#1223)
Feb 04, 2020	Language input aspect (#996) * Add language as input aspect
Oct 29, 2019	feat: allow `acknowledgements` & `previous_authors` in rule frontmatter. (#997)
Sep 25, 2019	Updating rule name(s) and filename(s) (#943)
Sep 03, 2019	Add many missing links to glossary (#695) * Add support for short references style. * Turn most (all?) glossary usage into links.
Aug 21, 2019	fix: update links to WCAG21 resources (#776)
Aug 21, 2019	Editorial changes (#725) * End descriptions with full stop * Correct WiP citation * Update links to DOM spec
May 07, 2019	Template update - Video element description track (#532)