Using player 5 (Mediaelement) generates extra characters that appear as post content just above video ('); })... You can see example here.
Same video on iphone and iPad shows up but won't play, does not show volume control.
In any browser fullscreen is not working.
Also player 6 does not show video on iphone/ipad. Just tried, but that is not really my concern since I would prefer player 5 anyway ;-)
Genesis framework 1.9.1 with custom child theme
Hana FLV Player 3.1.2
Win7 OS & Browsers: Safari 5.1.7, Chrome 24.0.1312.57, IE9, FF 18.0.1
iPhone/iPad Safari on iOS 6.1