How do I get/enable the tracing feature shown in the video below? Is this something that I get to see while the query is in progress.

We currently have this feature for performing post-query analysis on our new execution engine, which will become the default in Daft 0.4! We don’t yet have a mechanism to present this information live, but maybe @Colin Ho has some thoughts there

Currently the tracing feature is only for post query analysis, and it's not fully ready yet. As for interactive analysis, that's probably something on the midterm roadmap for us