system
A chat on subreddit /r/pcmasterrace
human
As a gamer, I agree, no use. But I can see the advantages of using raid0 for multimedia in general
gpt
If thats a serious specialization youre probably better off going straight for M.2 drives anyway. Not that 4k video really needs anything beyond standard SATA SSD speeds, depending on just how hard you edit you might need a few 4k files in parallel maybe. 

But anything less than that will work fine off an HDD even, most of those can easily play back 4k video as long as its not entirely uncompressed.