Dlc in other entertainment mediums?

Hey 

i was talking to some of my friends and we got onto the topic of dlc and one of my friends misheard me and thought i said *muisic dlc* which we thought was pretty intresting but it sprung another question.why in games is it ok to release extra content after the original content?in no other entertainment mediums would this work

music:buy a song of itunes and in 2 months pay for another 30 senconds ??

tv:the show ends on a cliffhanger and what?you have to pay to see they end?

i could go on but i want to pass the topic onto you.why is it ok to do this in games when it doesnt make sense just like the examples above.

thanks

-lee

Well in games the dlc is normally made when the game team has finished the project and they have a few spare weeks before the game has been processed, approved and ready to ship. So paying for their extra work if you want it isnt that big of a deal. Also the dlc isnt the ending of the game. For example Fallout's dlc is a completely new experience off from the main story with new items people and areas. For games like call of duty with their stupid $5 camos now thats just bullshit. 

i see what you mean but wouldnt the time be better spent on debuggin the game and that short of thing?

Hate when they save some parts of the game for dlc.

Well, with music, we have singles, remixes, B-sides, and things like that. For movies and TV, we have extended cuts and deluxe editions with alternate endings, interviews, production documentaries, and that sort of thing. So the idea of purchasing additional content has definitely been around in other parts of the entertainment industry for a while.

No because they make the dlc when the game has been finished 100% and is getting its age rating and stuff

I think DLC should be free, if its enough work to charge then it should be a separate game

well, TV shows have DLCs. Pretty much all TV shows end with a cliffhanger so people would watch next season.