Buy a good well known and or verified box and you won't have to go seeking a physical shop to buy. Cuz it'll just work as intended. Just buy online and it's delivered to you... You go to some shop and get sold crap by the sleazy salesman.. Later comeback here to complain how the shit box you bought from an "expert" isn't doing all you wanted and you've wasted money..

You say "watches and streams all kinds of videos"..
1. That's too vague
2. Wants something that does it all but your budget is sub RM300..? That's never going to happen. Good things no cheap and cheap no good.. Manufacturers and software devs have to eat too..

Read through the entire first page (few times if difficult to grasp) and the last...at least 20 pages for such recommendations.. It's in there and public knowledge.. No extreme spoonfeeding here. My apologies, I'm blunt this way and mean no offense.

budget 300 is not too shabby la
those range can play all type of media.

unless he wan netflix/asteruk... tat different story
but those apps is still on sw level, hw itself aldy good enuf

For your budget of <RM300 to stream Netflix HD, Mecool M8S Pro L with voice remote as reviewed by few here. But you'll need to buy online