PeerTube/FAQ.md

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# FAQ
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## If nobody watches a video, is it seeded?
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Yes, the origin server always seeds videos uploaded on it thanks to
[Webseed](http://www.bittorrent.org/beps/bep_0019.html).
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## What is WebSeed?
It is a BitTorrent extension that allows a server to seed a file through HTTP.
It just needs to statically serve a file, then the clients will request chunks
with a `Content-Range` HTTP header.
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## If a client requests each chunk of a video through HTTP, will the server be overloaded?
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Not really. Reverse proxies like Nginx handle very well requests of static
files. In my tests, it can send chunks at 10MB/s without consuming more than 5%
of CPU on a very small VPS.
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## Will an index of all the videos of servers you follow be too large for small servers?
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In our benchmarks, 1,000,000 videos takes around 2GB of storage on PostgreSQL.
We think it is acceptable for a video platform.
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## What codecs can I use for the videos I want to upload?
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WEBM, MP4 or OGV videos.
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## I want to change my host or move to HTTPS, how can I do that?
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If you already have followers, you can't.
If you don't have any followers, update your configuration and run
`NODE_ENV=production npm run update-host` to update the torrent files.