tenho visto que há algumas dificuldades com o post de vídeos, fica aqui uma ajuda:
Acorestube

<embed src="http://www.acorestube.com/nvplayer.swf?config=http://www.acorestube.com/nuevo/econfig.php?key=d1d3537f4c5038264ef3" width="430" height="344" wmode="transparent" allowscriptaccess="always" allowfullscreen="true" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" /></embed>

colocar só o key -> d1d3537f4c5038264ef3

youtube

<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/asNsaQP55GU&hl=pt-br&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/asNsaQP55GU&hl=pt-br&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>

colocar só o v -> asNsaQP55GU&hl