Supported Parameters are
Defines the Offset, the Player will start at. This Parameter takes a Float and corresponds to the "delay" Configuration Option.
Defines the Index of a Container Element, the Player will start at. This Parameter takes an int (starting at 0) and corresponds to the "startPosition" Configuration Option.
Similar to nxp_plswi, but instead of defining the Index of the Container, this Parameter takes the ID of the Element to start with (and computes the Index then automatically).
This Parameter defines the StartContext of the Player. It it rarely necessary to set this, but in some Situations, it may be usefull to set this Value to a supported Value to indicate the Origin of this Player.
These Parameters also work in iFrames, if they are appended to the iFrame URL.