As you can see on the screenshot from my previous reply, 24 images were used for products on our demo. In the video tutorial more images were used – http://topdevs.net/smart-product-viewer/360-product-video-tutorial/
You need to optimize images – https://imagecompressor.com/ or https://tinypng.com/ , and use jpg format, for example – https://prnt.sc/YZWWtuyPW1g7 > https://prnt.sc/lwjwTc8wLZYc
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.