Complex sentence: Debra Krause-McDonnell, who owns a business used in the Obama ad, requested that footage of her store be removed from the ad; its TV run ended, but the footage of her store in the ad can still be viewed on YouTube.
Split into simpler sentences: Debra Krause-McDonnell, who owns a business used in the Obama ad, requested that footage of her store be removed from the ad. After the ad's TB run ended footage of her store in the ad can still be viewed on YouTube.