An artist called 5haus sent a song to an artist called deadmau5 on his twitch channel. When deadmau5 read the sender name (5haus) he said: "original already", does it have a positive or negative meaning? I think that possibly it has a positive meaning because maybe he liked the name, or it could have also a negative meaning thinking about 5haus "copied" his name style. Or maybe is that a joke? Thanks for your comments!
One online dictionary has this definition of already, stating that it is a North American usage
used after a word or phrase to express impatience.
"just stop already, no one feels sorry for you
used to show that you are losing patience and want someone to stop doing something or to do something more quickly:
Enough already! I heard you the first time!
I've also seen a suggestion that already can be used as punctuation, instead of a comma already to give a small pause in a sentence.
When speaking, the degree of impatience being conveyed would be very dependent upon the tone of voice, it can sound either extremely disparaging or almost self deprecating; mocking oneself for being impatient.
The Urban Dictionary also gives another usage:
Houston, TX's gangsta resident way to say 'Fo Sho' or 'Yeah'.
In your example it's very hard to know what was intended. For sure the fact that the name is **not* original is being commented on with a degree of sarcasm, but whether it's in a friendly way or an irritated or condescending manner is not obvious to me.