0.8ร1ร1.2ร1.5ร1.7ร2ร2.5ร1 min 22 secโก๏ธ1 min 43 sec1 min 22 sec1 min 9 sec55 sec48 sec41 sec33 secIntroduction0.8ร1ร1.2ร1.5ร1.7ร2ร2.5ร1 min 22 secโก๏ธ1 min 43 sec1 min 22 sec1 min 9 sec55 sec48 sec41 sec33 secIntroductionYour user agent does not support the HTML5 Video element.