0.8ร1ร1.2ร1.5ร1.7ร2ร2.5ร1 min 20 secโก๏ธ1 min 40 sec1 min 20 sec1 min 7 sec53 sec47 sec40 sec32 secIntroduction0.8ร1ร1.2ร1.5ร1.7ร2ร2.5ร1 min 20 secโก๏ธ1 min 40 sec1 min 20 sec1 min 7 sec53 sec47 sec40 sec32 secIntroductionYour user agent does not support the HTML5 Video element.