VLC player may help play the clips, but if you want to get into editing them together to produce a video, you're beyond just playback needs and start getting further into upgrading hardware requirements.
But another thing you can try first if you do get into editing: using a proxy. That is, before editing with the 4K footage that you can barely play back, transcode it down to a format that does play well and use that in the editor. Then when it comes time to produce a resulting video from your edited together parts (and possibly adding audio, such as music), then you can instruct the editor to render the final video using the full-sized 4K source.
But even then, you might feel the need to upgrade. As Cyborg said, it's not a Mac vs PC thing, but the strength of the components:
- HARD DRIVE: both the OS drive and the drive you will use to play/edit video should be SSD. Within SSD, there's also "good" and "much better". The latter means getting NVMe SSD, which is faster than SATA. Though even the SATA SSDs are faster than normal HHDs. Expect these SSDs to be smaller sized per dollar though, so you'll still need large regular spinning discs to archive video.
- VIDEO CARD: the best you can afford. The upper NVIDIA with 8GB of fast memory also have a GPU that's capable of encoding/decoding the H.265 10-bit video the M2P can produce. 4GB of memory wasn't enough for me (kept crashing the editor). See THIS NVIDIA matrix table of cards to see which are good for what encoding/decoding. **
- CPU: even with a killer graphics card, churning away on files can still peg the CPU, so the best you can afford (hopefully at least an i7-10th gen), especially when multi-tasking.
- MEMORY: I do 64GB in my main machine, 32GB in the laptop I use in the field. Yeah, rendering video will eat up the video card GB first, but do the best you can here -- your browser tabs will use it.
- MONITOR: get the best panel you can afford. Touch-screen still isn't worth it still IMO, not required for this work and another thing to break. Spend that money on larger 4K with as much Adobe RGB coverage as you can.
** A couple of notes on hardware: a) the NVIDIA 3000 series hopefully come out in the fall, so the 2000 series is going to be a big bargain (even now, it's probably cheaper than the new cards will be -- I just picked up an RTX2070). and b) hardware is getting harder to get due to dwindling supplies during the pandemic. Personally, that makes me want to act sooner than later on ordering these components
Also, if you don't want to spend too much time thinking about the upgrade or putting it all together, the video game machines often have the same requirements as video editing: better components and a killer video card with a lot of memory.
Chris