fall back to non-custom youtube player on non-html5 browsers and youtube link on truly ancient browsers
fall back to non-custom youtube player on non-html5 browsers and youtube link on truly ancient browsers

tlhunter/mixpanel-js,getto23/mixpanel-js,tlhunter/mixpanel-js,getto23/mixpanel-js,tlhunter/mixpanel-js,getto23/mixpanel-js