The Island of Sodor video is (very darkly) hilarious. A bit salty so if you're sensitive to cursing.. be warned. Watch the out-takes for shots of the model makers building the dioramas at the end.
The report is actually decent for a news product, with a few factual errors but not bad IMHO. From a modeling perspective, it appears they used multiple scales of TtTE rolling stock and some 3D printed "faces" to get different expressions for the locos. I also got a kick out of the reference to the old Ringo Starr as the Conductor on the tv series.
I read the original Rev. W. Awdry book of Henry the Green Engine when I was a child, and I am here to say Henry did get out of the tunnel. Gordon broke down while pulling an important train and Henry was allowed out of the tunnel to save the day!