I will create 3 tables in mysql:
Movies: id-name-country
Tv-Series: id-name-country
Artists: id-name-country
Instead of entering country information into these tables seperately, i am planning to create another table:
Countries: id-country
And i will make my first three tables take country data from Countries table. (So that, if the name of one country is misspelled, it will be easy just to correct in one place. Data in other tables will be updated automatically.
Your approach so far is correct, ONLY IF by "country" in Tv-Series and Artist you mean country ID and NOT a value. And yes you can use foreign keys (country id in tv-series and artist is a foreign key linking to Countries);
Edit: Side note: looking at your edit I feel obliged to point out that If you are planning to link Movie/TV-Show with artist you need a 4th table to maintain normalization you've got so far.
Edit2: The usual way to decide whether you need tables is to check what kind of connection 2 tables or values have.
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