Merge branch 'source.ind.ie/better/content/issues/224' into 'master'

Whitelist: ytimg.com Closes #224.



See merge request !159

whitelist/ytimg.com/index.md

 # YouTube by Google (ytimg.com)
 
-> “YouTube is a global video-sharing website run by Google.” – [Source](https://en.wikipedia.org/wiki/YouTube)
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-## Why is it whitelisted?
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-To not break the web. Without this CDN, embedded YouTube videos would break.
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-## Decentralised alternatives
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-Decentralised, free and open alternatives that adhere closer to the [Ethical Design Manifesto](https://ind.ie/ethical-design).
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-  * [Vimeo Pro](https://vimeo.com/pro), allows you to embed videos from a video file without analytics. Supports third-party players.
+> See [youtube.com](/trackers/youtube.com).
 
 ## Block rule