Plenty of new GH5 test videos…

Panasonic GH5 ｜ 5-axis stabilizer　vs　GH4 O.I.S. [4K]

Best Camera of 2017? Panasonic GH5 Test and First Look (THiNK Media TV)
GH5 vs GH4 low light 800 12800 High ISO 8bit 10bit halfass comparison Rig Job
Blackmagic Ursa Mini 4.6K vs Panasonic GH5 (Daniel Peters).
Panasonic Lumix DMC-GH5 review (Camerahoarders).
AF video test by フジヤカメラブログ
Panasonic Lumix GH5 Menus (Pause to read) by ePhotozine.
Panasonic GH5 vs Sony Alpha a6500 (Andrew Crazy Hero).
Panasonic GH5 – 4:2:2 10bit　vs　GH4 – 4:2:0 8bit [4K] by Osamu Hasegawa Films
Panasonic GH5 Hands on with test footage (Juan Ramirez).
Panasonic Lumix GH5 im Review | CHIP.de

GH5 at Amazon, BHphoto, Adorama and Panasonic US. In EU at Amazon.de, Cyberport.de and ParkCamera.