Videos are laggy and stutter

For some reason I can't get videos to play on my new computer.

I've played the same video a number of players including VLC, Films & TV, Windows Media Player, 5KPlayer, PowerDVD and I have even uploaded videos to YouTube for testing and opened it up in a video editor called HitFilm Express.

I have downloaded the K-lite codec pack and the CCCP codec pack which did nothing.

I have messed around with a number of settings in VLC player with no luck.

The they lag and stutter in different places every time and lag differently on some of the players so it's not the video file.

It lags in HitFilm Express.

It plays almost flawlessly in 5KPlayer and super close the flawlessly in PowerDVD.

But the strangest part is that it plays 100% flawlessly once I upload it to YouTube.

Plays fine on my Macbook Air.

Can anyone think of what the problem could possibly be?

Specs
i7 8700
16 GB RAM
1080 Ti OC
Windows 10 home 64-bit