"life-to-date" (sometimes expressed rarely as LTD) is used to mean the time from when a product first came out to the present. In this case you are correct - since 2003, which is when I assume this DVD first came out. Note: Usually, LTD stands for 'limited' and it is used for companies, meaning limited liability.

I think your correct, the word "life" in this context most likely means only since 2003 until the present time.