If you can access Canvas at http://<canvas>/, you should try visiting
http://<canvas>/plugins
$(document).triggerHandler('reset_media_comment_forms');
var temporaryName = $.trim($("#identity .user_name").text()) + " " + (new Date()).toISOString();
setTimeout(function() {
var recordVars = {
host: INST.kalturaSettings.domain,
kshowId:"-1",
autoPreview: true,
disableglobalclick: false,
showPreviewTimer: true,
removeplayer: false,
pid:INST.kalturaSettings.partner_id,
subpid:INST.kalturaSettings.subpartner_id,
uid:$dialog.data('uid') || "ANONYMOUS",
ks:ks,
themeUrl:"/media_record/skin.swf",
localeUrl:"/media_record/locale.xml",
entryName:temporaryName,
entryTags: "canvas, webcam",
thumbOffset:"1",
licenseType:"CC-0.1",
showUi:"true",
useCamera:"0",
partnerData: $.mediaComment.partnerData(),
showerrormessage: "true",
rtmpHost:"rtmp://" + (INST.kalturaSettings.rtmp_domain || INST.kalturaSettings.domain),
}