For four glorious minutes, Brits will be able to watch Planet Earth II in 4K. The broadcaster is releasing some "experimental footage" in the ultra HD resolution today, which viewers can watch until "early next year" on a small number of Panasonic TVs. It's a short clip, featuring a frog in a luscious jungle and a jaguar stalking its prey. The new footage also uses Hybrid Log-Gamma (HLG), a form of High Dynamic Range (HDR) which promises sharper and more colourful images. The BBC says the test clip is an "early but important step" towards offering 4K full-time on iPlayer.