Add spaces: Upuntilnow,allyouneededwasthatcodetogetthegametoactivatejustfineonthesystem.

Answer: Up until now, all you needed was that code to get the game to activate just fine on the system.

Add spaces: Oerlikonisopenallthedays,excluding23Decemberand6January.

Answer: Oerlikon is open all the days, excluding 23 December and 6 January.

Add spaces: Insuchscenarios,AVIfilemayfailstoplayanyofthedatastreams

Answer:
In such scenarios, AVI file may fails to play any of the data streams