The content of your talk is obviously very important; your audience wants substance, useful information and an inspiring message.
However, I often see speakers for whom the other half of their talk is a bit poor: the delivery.
Your audience is looking for emotional guidance on how they should feel about you and the talk. So…
+ Nail that first impression with some friendly enthusiasm: smile, say hello, talk in a conversational way.
+ Actually look at them. Perhaps that seems unimportant to you, but by not making eye contact with your laptop camera (or with their eyes if it’s in person) then I think you lose a vital aspect of engaging your audience.
+ Vary your pace and tone (vocal and seriousness) and include conversational links between the sections so that your audience can momentarily pause and resume, instead of maintaining a constant level of attention.
It’s not about clowning or being ‘unprofessional’, but giving your excellent* material the best chance of success.
* If it isn’t excellent, the best delivery in the world won’t save you. Sorry.