<meta> data global variables?

[ImprovedTube]

• the variables should be available globally in our code, for various future features /enhancements
  • (and if it ever fails we could identify the exact points, if the tags become available or load them with another https request (*sometimes it fails for new / restored browser sessions...? Playback speed still not working as intended #1750 @mlcivilengineer)

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• we already observe any DOM mutations here:
  

  youtube/js&css/web-accessible/functions.js

  Line 20 in b209b6b

  ImprovedTube.ytElementsHandler = function (node) {

<meta>-tags data stays the same, when the next video starts in the same tab.

so we get it from an invidious node at need to decide the playback speed feature

//The following infos will enable awesome, smart features. Some of which everyone should use.

whole 'META' is a bad way of going about it, we are comparing 11000 times for something instead of using

document.getElementsByTagName('meta').title.getAttribute("content")
document.querySelector('meta[itemprop=genre]').content

once when applicable, etc.

why? hi @raszpl

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(btw, music detection from speed-watching exclusions can be used too here )