A bit offtopic, but I ended up writing a simple GreaseMonkey script that allows watching of YouTube videos without any javascript enabled (aside from GreaseMonkey of course):

var elements = document.getElementsByTagName('script');
for (var i = 0; i < elements.length; i++) {
if (elements[i].innerHTML.match(/var swfHTML/)) {
elements[i].parentNode.innerHTML = elements[i].innerHTML
.replace(/\"/g, '__DQUOTE__')
.match(/(isIE) ? ".+" : "(.+)";/)[1]
.replace(/__DQUOTE__/g, '"')
.replace(/"s+s"/g, '').replace(/\n/g, '').replace(/\//g, '/');
break;
}
}

Comments won't work. This is unfortunate because youtube is full of many enlightening comments pertaining to justin beiber.