I Don't Follow or I Don't Follow Skyrim News is a running joke, mainly said by Danz, it means they don't know much about a subject or they're not an expert (i.e 'I Don't Follow Pokemon News'). As with most recurring phrases of this type, it's usually used sarcastically.
During a conversation about Minecraft and the Enderdragon in their Serenity Mine series, Danz mixed up Skyrim dragons and the new Minecraft dragon. He repeatedly asked if Skyrim now had dragons, although he actually meant if Minecraft had dragons, which greatly confused Gassy. Danz was quoted saying "I don't follow Skyrim news" before realizing his mistake. The Creatures have since used the joke in many situations and the title for videos like Danz' "I Don't Follow Moving Newz!!!" and Seamus' "P.O Box In Case You Don't Follow Creature News".
Danz's first shirt said 'I Don't Follow Skyrim Newz'.
Since Dan's creation of the phrase Sly, Seamus, and Kootra have all said it.
The phrase could be considered ironic as Danz has a playthrough of Skyrim.