this post was submitted on 23 Sep 2024
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Wouldn't it still need overhead to chose those blocks and send them instead of the video? Especially if they're also trying to do it in a way that prevents the user from just hitting the "skip 10 seconds" button like they might if it was served as part of the regular video.
It has to know which blocks to chose to get the next part of the file anyway. Except the next part of the file is an ad. So yes there is overhead but not for the video stream server. It doesn't need to re encode the video. It's not any more taxing than adding the non skip ads at the beginning that they already do.
Compared to the cost of reencoding the video (or even segments of it) it would be basically nothing, though.