i see on a old site: http://fotzenvideos.org/she-loves-massaging-her-pussy/ that the Kenplayer works there with redtube.
Could you check out why it works there and not in the Kenplayer version which we use actually?
I upload both versions here. The orginal which we use is here (http://spielekracher.com/Kenplayer.rar) and the version from the fotzenvideos is here (http://spielekracher.com/ken-transformer_fotenvideos_org.rar)
You could try the modified version on the amateur-porno.biz tube
For the http://fotzenvideos.org/ i can only give you access to wordpress at the moment but if you need my admin should creat a guesst account.
If you think you got it you can test this sites to see if the player works with redtube again.
Ps. i think you have to activate redtube into the kenplayer config then.