Was working on Seryet all day to fix errors like
Notice: Undefined variable: fullmd5cachefile in \localhost\components\com_seyret\plugins\videoserver\metacafe.php on line 226
Notice: Undefined variable: vdlink in \localhost\components\com_seyret\plugins\videoserver\metacafe.php on line 226
Notice: Undefined variable: fullmd5cachefile in components/com_seyret/plugins/videoserver/google.php on line 399
Notice: Undefined variable: showfrombackupbutton in components/com_seyret/seyret.php on line 2115
Finally figured out a way to get rid of these ..
Open up seyret.php in components > com_seyret [ and admin.seyret.php in administrator > components > com_seyret, if errors come up in the Admin panel too ]
Add error_reporting(E_ALL ^ E_NOTICE); to seyret.php and admin.seyret.php and voila ! 
Thank a lot! Thank for your helping!
Or you can go into the component and turn off error reporting..