MDL-65759 upgraded the parser.
lib/rtlcss uses this.
As a result, video js stopped working on RTL (
MDL-66982), as some directives (valid ones) were not being respected any more.
That issue was closed, but caused a larger RTL issue (
This issue is about working out why the css parser upgrade caused this (this was verified via a bisect - before that change the issue in
MDL-66982 is not present)
Note: As part of this issue resolution we need to ensure, apart from understanding why our RTL is so "unestable" and fixing it, that
MDL-66982 (RTL videojs) is fixed. Just to avoid forgetting it.