What player do you use?
I was a rusted on MPC (and more recently its derivatives MPC-HC and MPC-BE) fan until recently when the MPC devs flagged that it would not be continued. So I started looking to see what else was out there.

While the MPCs are still very capable players I've increasingly been using MPV, another mplayer-derived open-source project. 


It has a fairly minimal UI (which IMHO is a good thing),
it is GPU-rendered and seems to be pretty resource light–on my machine we've been watching 6K camera footage in ProRes without problems.
It's easily configureable, has useful features such as colour management and HDR,
plays most codecs and formats that I throw at it without problems
It's cross platform, so if you swap between PC, OSX and Linux you can use it on all of them.




Another player that is useful to know is djv-view. This comes with some very useful tools such as histograms, RAM-caching for smooth playback and jog-shuttling and so on. It doesn't have audio so it's nto a general purpose media player, but it's a real winner for playing image sequences that would struggle to play smoothly otherwise–as long as you have the RAM for it. This is also cross-platform, available for PC, OSX and a linux package manager near you.