given yr situation, i think u shud take the unit back to the shop, get it to be flashed/reinstalled with the firmware u want.
but take note, flashing will erase everything, so you will also need to reinstall all yr user apps one by one, incl xbmc.
u-tube, you can get it with the browser. native hibrowser will work.
or if u like can download with pc some other browser apk to install, e.g. dolphin browser.

hk drama in hd...

there are 2 types of hk drama - same with everything else - live tv stations and on demand video.

foc/sd - within xbmc, u can install and find some under azdrama addon. but is limited, some don't work.
i assume u know xbmc, if not can visit the thread.

foc/sd - q5... not sure if yr firmware has mangto tv and hitv - both have some, limited, as most are mainland, mandarin.
even some of the hk ones are dubbed in mandarin.

cloudtv iptv - u can buy paid package from some resellers here (i don't use it). it has most of the common hk live tv stations, hd, i think.
free cloudtv has very limited stuff, no hk drama that will interest u.

other paid iptv - there are many other paid iptv that will have the live hk tv stations, season iptv just discussed is one of them. check the threads, several sellers/resellers r active.

Yes, all the popular english channel u mentioned is provided too. All all is in HD.
The picture is very great and sound is 2.1 instead of 1.0 like cloudtv.
But.... 1 thing to mention that, the subtitle is in chinese character even the voice is original english. So if u are chinese, should be great for u.