Does not make any difference to Twitter at all.

This add-on (and a similar) appear to work well, but have one big problem. They prevent embedded videos in some Twitter posts from being viewable. If the add-on is disabled, they work. The symptoms are: (1) the static image for the video flashes very briefly on the screen, but (2) then I get a gray player box saying "We cannot play the video in the browser. Try another web browser."

Here is an example: https://twitter.com/GreenRupertRead/status/1182979393666375680.

In Web Developer | Web Console, I get this further explanation:
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Cannot play media. No decoders for requested formats: video/mp4; codecs="avc1.42E01E mp4a.40.2", video/quicktime; codecs="avc1.42E01E mp4a.40.2", video/x-m4v; codecs="avc1.42E01E mp4a.40.2", application/x-mpegURL, video/mp4; codecs="avc1.42E01E mp4a.40.2"
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I hope you can find a way to fix this. If so, I will give this add-on 5 stars.

There is 0 difference, pointless add-on.