I am actually considering returning my MacBook Pro 15 2018.
The fullscreen video playback glitches out. (short multi coloured line popping in and out every so often.)
To test this, just playback some youtube video in safari in fullscreen mode.
*Tried with my friends MBP 15 2018, they all do this. And Googling it reveal people having this issues from the beginning of release. Don't know if Apple is ever gonna fix it. If not fix soon, I am returning it before its too late.
I made a post a few up from this. It is that damn GPU. It is not powerful enough to drive the retina displays. The cMBP is still the Best Buy if you can get one. That or just save money and buy the Air.
I configure our work laptops, and it annoys me that a $600 windows PC is less glitchy and doesn't lag when I resize windows like my $1500 Mac Pro does.