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Privacy advocate challenges YouTube's ad blocking detection scripts under EU law
(www.theregister.com)
this post was submitted on 31 Oct 2023
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Technology
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This seems simple for one stream, but scale that up to how many unique streams that Youtube is servicing at any given second. 10k?
Google doesn't own all of the hardware involved in this video serving process. They push videos to their local CDNs, which then push the videos to the end users. If we're configuring streams on the fly with advertisements, we need to push the ads to the CDNs pushing out the content. They may already be collocated, but they may not. We need to factor in additional processing which costs time and money.
I can see this becoming an extremely ugly problem when you're working with a decentralized service model like Youtube. Nothing is ever easy since they don't own everything.
So what you would do is to generate the manifest files (HLS/DASH/what have you) on the fly to include the segments with ads. Since adaptive streaming is based on manifests, that stitch together segments of video files that together make up the underlying content in different bitrates, you can essentially just push in a few segments of advertising in-between the segments representing the underlying content. This isn't particularly hard to do, and you'd get the full benefit of the CDN for the segments, so there's really no issue.