<< "si" typically refers to a parameter used in the URL for tracking purposes. YouTube URLs can contain various parameters that help track user interactions, such as views, shares, and other engagement metrics.
For example, a link might look like this:
https://www.youtube.com/watch?v=VIDEO_ID&si=some_value
In this case...
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@VisualStuart
"si" could be used to identify a specific source or campaign that led to the video being viewed. The value associated with "si" can help content creators and marketers analyze the effectiveness of their promotional efforts. >>
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