As this video was not the video I tried to find, here’s some difference;
I recommend turning levers position horizontally (90 degrees) unlike the video demonstrating.
Make sure you can turn handlebar 90 degrees both side without fouling the brakes housing.
PUT YOUR OLIVE IN FIRST BEFORE YOU TAP THE BARB IN, sometime the barb expand and make it harder to push the olive in.
Lastly; you shouldn’t need to bleed the system, it should be ready to go as it is.