if I wanted to create multiple whiteboard or explainer videos, I'd probably go out and buy one of the packages. The learning curve is pretty easy (it is for VMFX--not an endorsement, just my personal experience), they're cheap ($25-$75, depending on which package and what add-ons you buy), and they can produce some pretty good results
There are several programs that you can use to create whiteboard animation videos, including:
VideoScribe: This is a popular software for creating whiteboard animation videos. It allows you to draw on a virtual whiteboard, add text and images, and record your voice to create a professional-looking video.
GoAnimate: This is another popular software for creating whiteboard animation videos. It has a variety of templates and characters that you can use to create your video, as well as a wide range of customization options.
Animaker: This is a cloud-based software that allows you to create whiteboard animation videos, as well as other types of animated videos. It has a wide range of templates and tools to help you create professional-looking videos.
Powtoon: This software allows you to create whiteboard animation videos, as well as other types of animated videos. It has a variety of templates and characters that you can use to create your video, as well as a wide range of customization options.
In terms of converting your video to MP4 format, you can use a variety of video conversion software, such as the Movavi Video Converter mentioned in the article
www.movavi.com/support/how-to/how-to-convert-video-to-mp4.html. This software allows you to convert a wide range of video formats to MP4, as well as other formats.