I listened to most of Hagglund's rant in part II against any and all opposition to materialism, in hopes that the announced topic of a discussion of Derrida's "Ousia and Gramme" might emerge. Either it never did or I gave up at the wrong time. It was instead an analysis of Lacan's misinterpretations of Hegel and the mystifications of opponents of Darwin and purveyors of a poetic view of humans.
 

Hagglund lecture on "Ousia and Gramme" is in part I, the embedded video, and Zizek's in part II.
 

Thanks. I did confuse the two speakers. As I have already studied one version of Hagglund's argument. and he seems to need to mumble (the closed captions are hilarious), I shall wait for a printed copy of this paper to appear.