Could I download dlc for black ops 1 on a xbox 360

Yes the DLC should download to the Xbox 360.

Game and DLC purchases are associated with your Microsoft account. If you purchase the DLC on the Xbox 360, they will work on the Xbox One as well since Black Ops 1 is backwards compatible.

I know it is a pain but try deleting all the DLC for Black Ops.

Then clear system cache.

Re-download your DLC then start Black-Ops up to get the title updates.

Ight so i tried downloading 2 Black Ops 1 DLC after many failed attempts. It actually successfully downloaded. Maybe Microsoft fixed the issue? I suggest trying to download whatever you're having trouble again. Maybe it'll work this time?

Me too, i tried downloading the second DLC from Black Ops 1 this week and i didnt get it but today it really worked, but now when i want to download the Black Ops 2 game it continues with the same issue, i only successfully downloaded all the DLC and additional
maps from the game.

Yop,they could do a Destiny at $45-50...But at least they are not charging $ 80 (or more) for Destiny + first wave of DLCs....

I remember that Black Ops (Xbox 360) stayed over a year at $60 (without dlc)....