DuckTales series premiere is available LEGALLY on Youtube! · 3:18am Aug 15th, 2017
For those of you who don't have Disney XD (or cable) and live in North America (I'm assuming it's region-locked to North America but it might not be):
DisneyXD has uploaded the entire 44-minute premiere of DuckTales to their own YouTube channel.
If you haven't done so yet, go watch it!