<style>
.map-tooltip {
width:440px !important;
max-width:440px !important;
}
</style>
<div id='map'></div>
<script>
var map = L.mapbox.map('map', 'examples.youtube-embed', {
gridLayer: {},
// This line redefines part of the underlying code which
// sanitizes HTML from MapBox Hosting. The original code is there
// for the protection of sites, so that malicious map-creators
// can't add cross-site scripting attacks to sites that use their
// maps.
// Turning it off allows any content to be available in tooltips.
// It's recommended to only with trusted maps.
gridControl: {
sanitizer: function(x) { return x; }
}
});
</script>