Use PowerPoint’s built-in Export to Video feature
Use Google Slides with screen recording software
Use LibreOffice Impress and export as video through screen recording
Use OBS Studio to record your slideshow as a video
Use Zoom or Microsoft Teams to present while recording the screen
Use Canva to create slides and download as MP4 if available
Use online slide-to-video tools with free tiers
Use VLC or other free tools to convert recorded slides into video format
Save slides as images and combine them into a video with free editors like Shotcut or OpenShot
Add narration by recording audio separately and syncing it in a free video editor
Export the final file as MP4 for widest compatibility