Simply because english is one of world wide used languages, and compare to other languages, english is not that hard, and most of chinese have to learn that in high school or even earlier
If the movies came from Uganda, and most of the news is around uganda, than of course, chinese would talk about Uganda more.
btw, i thought that usa is something the whole world eager to talk about .
About Uk, hmm, i did not know that chinese talked lot about that, i thought only someone like british music would be crazy for that. well, England and Usa are like brothers, when we talk about one of them ,than hardly do not mention the other one . they always move together, right?