Why are people down voting this?

It may be a bit pedantic and out of topic duty the meme, but it’s true. .MP4/WebM would have the same effect much more efficiently and with higher quality

Using wefwef.app it autoplays

I think OP means seeding torrents, not serving media like Jellyfin does

Is S3 more cost efficient? I have had experience with it being much more reliable and durable, but the cost in the long run could be higher than having it next to the service