I know of no Orthodox movies, but movies w/scene's from Orthodox Church services come to mind.
"The Dear Hunter," has scenes from a wedding and funeral filmed at the historic St. Theodosios Russian Orthodox Cathedral (OCA) in Cleveland, Ohio.
There are at least two movies about Nicholas and Alexandra which include scenes of Orthodox Services.
Also, there's a beautiful made for TV movie from the Kojak series. The story is about a young Greek girl who has been separated from her mother, from an airline flight from Greece to New York. Theodosios Kojak is seen getting out of a car, picking up a newspaper on a news stand; it's the Greek language version of "The National Herald," "Ethnicos Kirix." The very cute little girl speaks Greek through the episode to Kojak who devotes his time to finding her mother and eating in Greek restaurants. There's also a Kojak episode where Kojak is seen leaving the precinct announcing, "I'll be at St. Basil's Church in the Bronx." The story involves the wedding of his niece.
And, of course, "My Big Fat Greek Wedding" shows short portions of the Baptism and Wedding Services, chanted in the Greek language, though the hymn chanted after the immersions is not "As many as have been Baptised..."
There is another movie from the mid-'80s (+/-), about an East European Orthodox bishop, in America, with a Nazi past, (mirroring the story of Romanian Orthodox Archbishop Valerian (Trifa), of Blessed Memory.)
You may wish to view the web site of the Greek Orthodox Archdiocese of America, "www.goarch.org
" for numerous instructional videos from "GoTelecom."