have a look at mip_levels, the new var

Isn´t this a global setting? I don´t want to disable mipmapping completely.

you can make a plane model, and disable mipmaps on it's skin and use it's skin to render your video?

(you can remove mipmaps by unchecking mipmaps on skin settings.)

may work?

This worked in 7.5 but strangely not anymore in 7.6.

may be a bug.

Yes, you´re right,I forgot that compressed dds does not work with mipmaps.
But for flat entities alternatively you can change the distance for mipmap textures with mip_flat function.

Here you will find an example with mip_flat = 10.

have you thought about setting d3d_mipmapping to zero in a render event, resetting it afterwards?

As far as I know setting d3d_mipmapping only works at engine startup but because of your suggestion I had the idea of simply setting MipFilter[0] = none; in a material. Darn, why didn´t I think of that earlier.

that would do the job, definately...