A lot of songs have multiple edits - usually at least a radio edit and a album edit. To my understanding, the difference is usually that the radio edit is edited to be shorter and more "to-the-point": No long intros, only short solos, and no outro. Sometimes, they are also made to sound louder (see Loudness War).
I was wondering if something similar happened with movies and TV-Series. There is at least one difference I seem to have noticed, but I don't know if this is done right at the edit, or is done by the broadcasting station: Movies in digital format or that I have on Blu-ray seem to have far more dynamic range in their audio. When other people are in the house, I have to often constantly turn the volume up and down (quiet dialogue v.s. loud, more active scenes). However, this never seems to happen when watching TV.
Is this an actual thing or am I just mistaken? If so, is it done in during the edit and are two versions released, or is this done by the broadcaster? I assume it is for viewer comfort - people who don't want this level of immersion would perhaps not like the fact that you can barely understand dialogue but cannot have a conversation while there is shooting going on, but I can imagine it might be for bandwidth reasons, or even the same reason as the loudness war in music?
Are there any other differences in edits? Perhaps the TV edit is edited to fit nicely in a multiple of 20 minute blocks?