Nerd mode
Nerd facts
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How this video is delivered.
Now loaded
Open a media view to see what it used.
Videos
The standard path is MP4 because it works almost everywhere. Some posts also have DASH for adaptive playback, controlled from Media settings.
A poster keeps browsing light. Opening the video is the signal to spend more bytes.
HLS · MPEG-DASH
Why there are choices
There is no single perfect file for every screen, browser, and connection. Browse stays light; inspect spends more only after the page has a reason.
These details show what the page can actually load, so the controls stay honest.
