The most successful internal launches are often big ones (i.e., rolling out a new product or sales methodology such as solution selling), and in my experience, they include: (1) an executive sponsor (2) alignment with business priorities and (3) internal momentum.
I would tailor the cadence and materials to your audience. You need a general track for all sales reps to highlight the 90-day roadmap updates, highlight key launches and other relevant topics. It would be best if you had a separate technical track for your technical field teams that will go deeper into the technical side of the feature. A bi-weekly live call (for 60 min) seems to do the magic from a cadence standpoint. I've seen PMMs do loom videos and try for an offline education track, but it does not work. Also, avoid the last week of the month for a sales enablement call :)