if u describe:

.. how much it is
.. how u will buy
.. how u intend to watch hk movies/drama, eng movies
.. what broadband speed u hv

can comment further.

if u hv read at least the first 2 pages of this thread, u will have an idea how these boxes work.
they are not like astro or hyppbox where u just press buttons.
the box is empty at first, need to load in the apps.
depending where u buy and who u buy from, some of them come with some apps preinstalled.
the thing is are those what u want?
if they aren't, where and how will u find what u want?
a lot of apps look good but they don't work well or don't work at all!
also, some apps die off after a few weeks or so, u need to find updates.

how good a box is is determined by the specs of the chipset and the firmware the maker put in it.
that box u mention is 1/16gb android5. 2/16gb is the norm now.
as for firmware, poor ones will eventually lead to problems like hanging, slow response, cannot play this and that, etc.
a good box also has regular firmware updates and u know here to get them.

it is understandable that u are still finding out how it all works.
take time to read the first few pages, a lot of work has been put there by TS.

the above is about online streaming.
another way to watch videos is first download on your pc, then playback at the box via usb port/hdd.
most people use an android box for both purposes.

lastly, RM400...u have quite some choices.
again, some popular brands and models listed in the first page of thread.