Every day, Amazon offers up “Lightning Deals,” limited quantities of various products for a discounted price for a 4-hour window of time. You have to be on the lookout for these deals and once the item runs out within that four hours, the sale is over.

Meaning, if you see something on sale that you want, buy it immediately before it’s gone.

Typically you don’t know what will be on sale until the minute it gets posted, but as a prelude to Black Friday, Amazon has released today’s Lightning Deal schedule for Movies & TV on DVD and Blu-ray. See list of today’s deals here below, along with more information on how these special deals work.

UPDATE: Amazon has lowered the price of ALL seasons of Mad Men on DVD and Blu-ray to $9.99 each from November 25-27!!! Visit the Mad Men page to select DVDs/Blu-rays to purchase.

THURSDAY, NOVEMBER 25, 2010

4:30 a.m. – 8:30 a.m. PST

Sex and the City: The Movie
DVD – $1.99

Letters to Juliet
DVD – $8.99

Remember Me
DVD – $5.99

The Tudors: The Complete Third Season
DVD – $14.99

Diary of a Wimpy Kid
DVD – $7.99

Flicka
DVD – $1.99

Hotel for Dogs
DVD – $6.99

Scooby Doo: Abracadabra-Doo
DVD – $1.99

Scooby Doo and the Samurai Sword
DVD – $1.99

Modern Family: The Complete First Season
DVD – $19.99

8:30 a.m. – 12:30 p.m. PST

Sex and the City: The Complete First Season
DVD – $9.99

Sex and the City: The Complete Second Season
DVD – $9.99

Sex and the City: The Complete Third Season
DVD – $9.99

Sex and the City: The Complete Fourth Season
DVD – $9.99

Sex and the City: The Complete Fifth Season
DVD – $9.99

Sex and the City: The Sixth Season Part 1
DVD – $9.99

Sex and the City: The Sixth Season Part 2
DVD – $9.99

12:30 p.m. – 4:30 p.m. PST

Ice Age
Blu-ray – $5.00

Marley and Me
DVD – $3.99

Night at the Museum: Battle of the Smithsonian (Three-Disc Blu-ray/DVD Combo + Digital Copy)
Blu-ray – $5.00

Garfield: A Tail of Two Kitties
DVD – $1.99

Punky Brewster (Eight-Episode Set)
DVD – $1.99

Ice Age: The Meltdown
DVD – $1.99

4:30 p.m. – 8:30 p.m. PST

Entourage: The Complete First Season
DVD – $9.99

Entourage: The Complete Second Season
DVD – $9.99

Entourage: The Third Season Part 1
DVD – $9.99

Entourage: The Third Season Part 2
DVD – $9.99

Entourage: The Complete Fourth Season
DVD – $9.99

Entourage: The Complete Fifth Season
DVD – $9.99

Entourage: The Complete Sixth Season
DVD – $9.99

Note – the discounted price won’t appear on the product page, you have to put it in your cart and check out to see the sale price (there should also be a button at the top right that says Lightening Deal that will show the main LD page).

Also, Amazon’s Blu-ray box set deal of the week is the Alien Anthology Blu-ray Edition for only $70.49 (that’s 50% off the list price of $139.99). This deal is valid only for this week through November 27, 2010.

FYI – Click HERE to browse titles available for rental through Amazon’s Video On Demand service. There’s new releases like The Expendables, How to Train Your Dragon, and Iron Man 2; favorites like The Dark Knight, Ghostbusters, and The Wizard of Oz; and also the first six Harry Potter films.

Per Amazon:

Lightning Deals have a limited quantity at the prices listed below, so it helps to move quickly if you see something you like. You now have a limited time to purchase a Lightning Deal after it has been added to your Cart. After you add the deal to your Cart, you will have 15 minutes to make the purchase. You will be notified by an alert that will display in the upper right-hand corner of the page when you have 10 minutes remaining to make your purchase. You must check out within this timeframe to receive your promotional discount.

If you have not purchased the deal before the time runs out, the discount will no longer apply to the product in your Cart and will be available to other customers who are interested in the deal. If quantities run out, you may apply to be waitlisted for that item.