What I "like" about those movies and TV shows is that there is always some "expert" who talks about how the producer/director made sure the coat buttons have the right insignia and the shoe soles have the correct number of stitches, then they show an Model 1873 trapdoor in the Civil War or a Model 1861 rifle-musket in the Revolution.
I saw a CW show the other night, with a bunch of modern re-enactors. Guys, I love you, and know you do your best to keep history alive, but darned few Confederate or Federal soldiers had big pot bellies and white beards. War, then as now, is a young man's "game".
Jim