2003 Bosxters don't have spark plug tubes.
Jack the car up on the left nack side, remove the wheel, go below the car and try to check where the oil s coming from. If you can't see, because there is to much oil than clean everything up, take the car for a ride jack it up again and check if you can see now where the oil is coming from.
Above the area you've filmed is a sensor. Maybe the leak is caused by that.
And if it's possible please make videos that don't shake the whole time.
Regards
Markus