So is the stress on the first or second syllable in 'moderne'? She places it on the second, whereas the male speaker puts it on the first...
Second syllable. She says it correctly. The male speaker pronounces it the wrong way.
this = denne, dette 'This is a modern museum' translates to 'Dette er et moderne museum'
In this sentence, why is it "museum" and not "museet"? Are both correct? If so, when should I use which?
With words coming from Latin and ending in "-um", in the definite and plural forms, the "-um" is (sometimes, not always) removed and replaced. et museum = a museum, museet = the museum, flere museer = several museums, alle museerne = all the museums.