Number/Demonstrative + 部 + Noun (film/work)
部 (bù) is the measure word used when counting or specifying movies, novels, plays, and other major creative works. In Chinese, you must place a classifier between a number or demonstrative and a noun, and 部 is the correct choice for works of film and literature.
这部电影真的太好看了。
Zhè bù diànyǐng zhēn de tài hǎokàn le.
This movie is really amazing.
他去年写了两部小说。
Tā qùnián xiě le liǎng bù xiǎoshuō.
He wrote two novels last year.
我昨晚看了一部纪录片,特别有意思。
Wǒ zuówǎn kàn le yī bù jìlùpiàn, tèbié yǒu yìsi.
I watched a documentary last night; it was really interesting.