As suggested, the lighting is key for a “film look”.
I think I know what you are referring to though… I’ve used something similar to fake a blue filter across a sky. For the blue, I’ve created a blue matte, cropped to where I needed and used the composite modes (transfer modes? – I can’t remember off-hand what they’re called) to composite onto the video. Opacity to taste.
You could use an oval matte created a matte in PS and do the same, keyed over the video so it goes to black at the edges, then use one of the composite modes (Possibly Overlay). Opacity to taste.
Hope this helps.
TC