It is still a mystery why some combinations work and others dont


Source files: animals


Left Side: Google IFrame Test

Right Side: HTML5 Video Test


youtube 20070606 171609 burgers bush ocean avi
drive 20071009 125353 blijdorp avi
drive 20071009 125353 blijdorp avi
drive 20071009 161441 blijdorp avi
drive 20071009 161441 blijdorp avi
drive 20071009 163138 blijdorp avi
drive 20080602 163531 tenerife jungle park las aguilas vogelshow avi
20090622 131939 aqua zoo road runner avi
drive 20110917 165821 leeuwarden aquazoo mieren 640x480 crf 25 mp4
drive 20111013 122660 kerkrade gaia giraffe avi
drive 20120425 112551 texel de petten meeuwen avi
drive 20120425 150134 texel strandloper avi
drive 20120507 153521 amsterdamse waterleiding duinen damherten avi
drive 20120507 155105 amsterdamse waterleiding duinen oase kauw gek op koffiemelk avi
drive 20120605 141040 medumblik kat en boze eksters mp4
drive 20120709 093510 kolibrie meeuwen mp4
drive 20121009 162152 burgers zoo ocean mp4
drive 20121009 162153 burgers zoo ocean rog en haai mp4


HTML5 Video Formats and Browser Support

Currently, there are 3 supported video formats for the <video> element: MP4, WebM, and Ogg:

Browser MP4 WebM Ogg
Internet Explorer YES NO NO
Chrome YES YES YES
Firefox Since Firefox 21 on Android and Windows Vista+7+8 YES YES
Safari YES NO NO
Opera NO YES YES

Source: w3schools