Yeah it's an amazing port. Only downside would be the random occasional crashes/softlocks but apparently those issues were also there in the original release, with worse framerates as well. Think it's only a matter of time until they get them fixed, but even then, it never bothered me.
Edit: as for the video itself, it's really cool how the devs gave DF footage from development, and insight on how they went about optimizing it. That bit about the lighting blew my mind, it's crazy when you start realizing just how much work and effort was put into this.