Direct play buffering

[cinebiker]

I am buffering while direct playing and don’t know why. Jellyfin is installed on a dell optiplex that I use as a media server and the client is Swiftfin on an apple tv, all wired over LAN. The optiplex definitely does not have the best specs in the world, but Jellyfin claims that it is direct playing so I feel like this shouldn’t matter. It does not buffer on other clients such as a web browser. 
Logs:
https://pastebin.com/qZF8x1Mn
https://pastebin.com/Psq1eCha