My YouTube is slow! How do I fix it?

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nianet-cph2 (5.103.0.0/16)

ISP: Fibia Net (or seas-nve if their name change hasn't occurred yet). I live in Denmark. Happens in both Firefox and Chrome. No extensions at all in Firefox. My connection is completely fine in regards to both downloading and uploading (full speeds shown at speedtest.net). I tried using google DNS and not using google DNS (8.8.8.8 & 8.8.4.4).

/r/youtube Thread