I'm a bit confused -- my GH5 should arrive in two or three days, but I can't seem to find any info on how to activate VLOG (my info is that this will be a paid upgrade as with the GH4). At least the German Panasonic online shop doesn't seem to yield any results. I'd love to shoot VLOG with it from the start, and have a major project starting in about 10 days...
Here's some pointers, search for 'DMW-SFU1':
e.g. both Digifoto and Fotokoch seem to be sending stuff abroad. No stock yet though. https://geizhals.eu/panasonic-dmw-sfu1-updateschluessel-a1567852.html . Might wanna shoot a msg in direction of these guys too: https://www.panasonicstore.ie/about-us/ . Or https://eng.faq.panasonic.com/app/ask/p/5 , does say 'UK & Ireland', so they must gotta have some info for you on how to get a hold of one. Gd luck.