My friend, with the " transcoder arista " i can convert with cero problems, when i download the aplication and run it, i go to the page to view more formats and i find the " youtube HD " format, very good option right? jaja i download and install this, i convert one video .ogv to out.mp4 and i try to upload on youtube and the video uploaded have some screens grays o_o in diferents moments of the videos ( this means the codecs are wrong.. ) so... i use your option of "Webm" and no problems to upload, the quality are lose but no much, now dont need the camtasia, i will do it only with recordmydesktop and convert the video to youtube with the "Webm" direct to upload. Thanks partner for the help, now i will go to uninstall the camtasia. Bye =)