CLUTs (Color Look-Up Tables)
CLUTs (Color Look-Up Tables)
The sample images appear to have been created to specifically emulate a cinematic look. I suspect that a CLUT was applied to a color-corrected original. This is a technique used more in cinematography than photography.
The "Lomography Redscale 100" HaldCLUT is a good place to start. After that, decrease shadows and highlights, desaturate, add some vignetting, and crush levels.
Bokeh
Bokeh
Notice the ring-shaped or "bubble" bokeh, which is caused by the type of lens used to record the image (Cooke Triplet). (Different from swirly bokeh, which is caused by a different lens feature.)
The specific type of bokeh may be less important than just having the right amount. Use longer focal lengths with larger apertures. If you have to choose between focal length and aperture, focal length istends to be more important. Get the subject close to the camera and far from the background. Notice how far away the trees are.
Vignetting
Vignetting
Don't over-do it. Notice that details are still visible in most of the corners.
Try to choose a lens that has natural vignetting, which you can enhance in post by decreasing shadows. Turn off any corrections your camera may be automatically applying.
Examples
Examples
Here I start with a fairly cheerful image (Makinon 28mm F2.8), and try to make it less so:
This is what I get with @Tetsujin's bear (18-55mm/F3.5-5.6 @ 55mm/F5.6).
Basically the same thing with @AlanJurgensen's photograph (Helios-44-2 58mm MF f/2), except swapped Red and Green channels and did some layer blending to change the color of the folliagefoliage.