If you are new to flash photography and thinking about giving the Fujifilm EF-X8 or EF-X500 a try on the Fujifilm X-T2 then this video might be a good place to start. In this video Billy from the Fuji Guys helps Maarten Heilbron, an inexperienced flash photographer, better understand how the Fujifilm E-FX8 and E-FX500 work. You can view the other videos about the EF-X500 from the Fujiguys here.
Fujifilm EF-X500 Flash B&H Photo/Amazon/Adorama
Fujilfilm X-T2 B&H Photo/Amazon/Adorama