If you’re on a Mac, QuickTime is a great way to record your screen (and audio at the same time). On a PC PowerPoint has a screen record feature what’s pretty awesome. You don’t even have to be using it for your slides.
Most of the time, your microphone will be the only audio input that virtual presentation software can handle, cancelling out any audio in your slides. To solve this you can use virtual audio software like Loopback (Mac $99) or VB Audio Cable (Mac/PC free or by donation) to combine the system audio with your mic.
Your goal should be to create a pro-grade recording of your presentation, which will require that you edit your audio, screen, and webcam together in post production. You can use tools like Final Cut Pro X (Mac), Camtasia (Mac/PC) or DaVinci Resolve (Mac/PC). Final Cut and DaVinci both have an auto sync feature to make sure your audio and video are in perfect sync. You can find a deeper dive into how to edit your video together in The Ultimate Guide to Giving Virtual Presentations on Zoom.
If you’re using a DSLR or mirrorless to record you, that’s what you’ll edit together with your screen and audio. But if you’re using a webcam, you might need to record it using the software that came with it. If you have a Logitech Brio you can use the Logi Capture software. Alternatively, you can use software like ScreenFlow (Mac) which can record many inputs (webcam, screen, audio) making editing easier.
I’ve found that the best way to record audio is to use the software you’re using to capture your screen. This lets you sync with your webcam footage more easily, as that will also have an audio track (from the built-in mic of the webcam). Note, you won’t use the audio from the webcam, that’s just to help you sync with the screen recording video.
Virtual event platforms
All virtual event software is different. Grab a free trial of the software and explore the features.
Test event software
Similarly, you should do a dry run of your talk using the virtual event software that you’ll be using for the event. This will help you understand how to start your slides, how the interface will look (there might be panels you need to close so you can see your slides), and most importantly, you can check if your audio and video are playing properly and how any animations look.