Here’s that documentary about the Falklands which they made a few years after the conflict.
There’s plenty to choose from if you’re looking for a book about Thatcher. Charles Moore, who was the most reliable friend of Thatcher on Fleet Street and edited the Telegraph, has written the official biography. Volume One finishes with the Falklands.
But this book is specifically about Thatcher’s foreign policy, written by a key adviser, and for my money a better read.