The author seems to have some interesting OS projects, and also his own PL, which seems to be used by the author for his Serenum OS, but many questions remain open (e.g. what's the architecture of the kernel, how does it releate to known kernel architectures and what's the specific advantage, same questions for the PL). Interestingly, no references to other work at all; the author even seems to use his own terminology.
Not the best talk. Maybe it got better later in the video..
Well, feels like a typical nerd talk, just starts with some detail and then meanders through all kinds of other details; it's best understood if you already know how all these details fit together ;-)