QUOTE(perfect10 @ Dec 23 2016, 11:00 PM)
just wondering if anyone worked kodi with a desktop i5 pc??

Shouldn't be an issue.. Performance is limited to the PC's hardware though.. Especially where VP9 or H.265 files are concerned.. Lastly, without a compatible sound card & or GPU drivers.. Do not expect HD audio.
QUOTE(fruitie @ Dec 23 2016, 11:32 PM)
Bought a box recently and the seller put in a lot of add-ons for me which I think some may be redundant for me. I will check out first page to see which add-ons suit me and gradually delete those don't interest me.

Though the box comes with internal 32GB, I cannot simply waste it.

Anyway, I have a question regarding YouTube add-on, I can't play anything beyond 720p. The box is capable to play 4K though I haven't tried before.

So, in the end I sideloaded YouTube apk and I can play full HD now. Is the add-on cannot go beyond HD? Or did I miss any step?
In due time and needs dependent. You'll find that having just a few core addons (in my case, about 5) is sufficient.
Yes, the Kodi YouTube addon will only output a max res of 720p. Unfortunately, such is here to stay till circumstances change.