David Tennant, best known for playing The Doctor in Dr. Who & for portraying Barty Crouch Jr. in Harry Potter, is an accomplished stage actor. PBS hosts the film version of the stage performance of Hamlet.
Watch the Film
Also, in the genre-bending performance category, Anna Deavere Smith's TED performance bridges the gap between a play and a film, as the performance takes place on a stage, in front of a large number of people, but that there is also a camera that takes close-ups images of her while she is performing.
Anna Deavere Smith: Four American characters | Video on TED.com
Do you classify these more as film pieces or a theater pieces? What elements of the performances make you feel this way? How do these elements make the performances work or not work for you?