The Verdict: Need More Info
Canada has its own Youth Mobility agreement with Germany, and its age limit is the one fact to confirm. Check it with the German mission in Canada before you plan around it.
It works much like the working holiday programmes: a stay of up to twelve months, funded by working. We could not confirm its current age limit or terms from the Federal Foreign Office list, which does not cover Canada.
Canadians may enter Germany and apply for the residence permit at the local Ausländerbehörde after arrival, rather than getting a visa first.
It is not a route to settling. It does not convert into a skilled worker permit, and time on it does not count towards naturalisation.