У вашего броузера проблема в совместимости с HTML5
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K's Lean & Toned Tabata Abs is great for developing excellent core strength and stability in just 4 moves. So grab your timers and set them for 20sec on and 10 sec rest for 8 rounds.
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Lean & Toned Tabata Abs:
http://youtu.be/mViwxmk2NOk