It should be possible to override styles generated from Captions settings in System Preferences with inline WebVTT styles when ‘Allow video to override’ is checked in System Preferences.
rdar://problem/46421091
Created attachment 357165 [details] Patch
Created attachment 357172 [details] Patch
Created attachment 357190 [details] Patch
Comment on attachment 357190 [details] Patch Thanks for reviewing!
Comment on attachment 357190 [details] Patch Clearing flags on attachment: 357190 Committed r239181: <https://trac.webkit.org/changeset/239181>
All reviewed patches have been landed. Closing bug.