I just got a sincere email for the developer of 5kplayer that invited me to use this new developed free video player and they also would like to have a feedback from my using experience.

link: http://www.5kplayer.com/
The site seems legit and shows me lots of features: play 2k,4k video and DVD; Airplay and streaming; download online video.

I downloaded and used for a while It's small but exquisite, very clean and easy to use. The interface looks clean and friendly.

If you are interested, you may try it. I know you won't be disappointed

here are 2 shots

Yes, I have this player for some time, no problem occurs till now.
I remember it also has converting video to mp3 feature, great!