I've said this on here before, but the trick to better online presenting for us tech-focused nerds is getting very familiar with OBS, get a Streamdeck (or build one, e.g. Deej) and set up your presentations so that you always show yourself in front and in the corner of any slide deck you're showing, much like most youtubers do. Then you can hand gesture all you want, too.
When WFH began, I put a bit of time into getting OBS set up, fixing lighting, using better camera, fixing audio. Very much worth it, though my laptop processor was ill suited for the task when added atop its normal “day job”. Built a desktop for the first time in years and reminded myself why laptops kinda suck. But yeah, the OBS picture-in-picture is good, plus overlaying your name, company and contact info elsewhere in the shot may be appropriate depending on audience (e.g. Q&A after presentation).
Knowing how to use OBS has also been useful in helping some non-profit organizations get their remote interactions dialed in.