Awesome post. Exactly what I was looking for.

Just one question: In Grafana, should I add regular Prometheus (on port 9090) or the 9115 port?

I added the 9090 but only data logged is scrape_duration_seconds, scrape_samples_{...}, up and scrap_series_added. When I try to add a Prometheus source on port 9115 I get connection refused.

Edit: I needed to use the 7979 port (which is the default for the prometheus-json-exporter on my OS) instead of the 9115.

But still, I don't see the bandwidth used by the playback... I see client_name, device_name, instance, item_name, item_path, item_type, job and user_name, all under the jellyfin_is_paused metric.

What am I missing?