It's surprising how often food/cooking myths keep popping up in these food mangas: Cast Iron does NOT heat more evenly. It RETAINS heat better once it gets hot, and it will stay that way longer (volumetric heat capacity), and people incorrectly interpret that as heating more evenly/faster (conductivity). But cast iron is quite bad at conducting heat- it takes a while to heat up, it will have hot spots and cool spots on the pan and changes depending on the heat source. You can get a great sear on meat, etc if you use cast iron, but you should move the meat around to make sure it browns evenly. Also, it gets a pass here since it's fiction, but it's actually REALLY hard to get paella done right with crispy soccarat rice on the bottom, especially on live fire! And for the first time cooking a paella recipe!
DON'T season a pan with olive oil. Use a higher smoke point unsaturated oil - canola, corn, or if avoiding chemical/industrial treated oil, cold refined avocado oil. Olive oil smokes at lower cooking temps and shouldn't be used to season a pan, which usually requires heat higher than most olive oils can handle. Yurucamp advertised doing olive oil too and it's really not a good practice- it will be more likely to create patchwork/flaky "seasoning" and the non-stick/protective properties will not last as long or as well. After the initial seasoning is done, u can keep cooking with it using whatever oil u want as the layers of protection build up over time, but the starting seasoning is important to get done right, otherwise rust and sticky cooking surface will be a constant issue.