Yubikey authentication in a mid-sized organisation

Picked one by one from a mixed channel. Transcript check: both title readers certain; 5 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include only technical talks, tutorials and lightning talks that explain how a specific piece of software, protocol, system or engineering technique works or is used. Exclude the welcome/opening/closing videos, keynotes, advocacy talks, humorous talks and soft community or mentoring talks.