Translation:That advertisement was created in Germany.
It seems to work for "this", so why not for "that"?
"This advertising was created and produced by Pepsy's 'in-house' agency"
"This advertising was created and produced by 20Fifteen"
Advert/advertisements are nouns, advertising is a verb and wouldnt make sense in this sentence
"advertising" is also an uncountable noun, and is also translated as "reklama". If the speaker is pointing at a variety of advertising material, rather than a single ad, it would just about work here.