After the video is completed, the video grid that YouTube invites you to watch, as it considers it to be associated with this video, appears and is available for viewing. When you click one of them, the URL is replaced with this URL of the video with & feature = related at the end so that it statistically recognizes the confirmation that you clicked it (as a presumption). He will update other videos with a higher number of clicks by the number of βrelatedβ to this video. When people publish a video with this function and its associated part at the end, they simply copy the address as a whole, not knowing that the section needs to be deleted ..
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