First check the action that corresponds to the error id, if everything is ok with it then check the if conditions that are above this action and most likely there is a syntax error there. There is an old bug in bas when the id indicates an incorrect error number
Try printing ( with log) the command you are trying to execute, run it in a seperate command line to see if it's working properly.
since it's related to input I am suspecting the problem is with the youtube url you are providing
