Basically, a laptop or MacBook with an internet connection is fine. Some software’s I use costs a one-time small fee. I recommended paying a small one-time fee and doing it, however, you can also use alternative software also.
The second part is to create the video. For this, I use a whiteboard animation software called doodly. What I do is import the audio file I have generated in step 1. After that add relevant texts and images. Once you purchase the doodly, they will show you some video’s on how to use it. And if you need help from us, you know where to find us.