Using that product page you linked to: https://juupee.com/products/portable-lint-remover
Here are some things you can do to optimize it:
1. Compress these images: https://analyze.speedboostr.com/result/fjvqwzam1z/rule/imageOptimization
2. Use responsive image size scaling (to load smaller images on smaller devices): https://analyze.speedboostr.com/result/fjvqwzam1z/rule/imagesTooLarge
3. Implement lazy loading to delay the load of images under-the-fold until the user scrolls: https://analyze.speedboostr.com/result/fjvqwzam1z/rule/lazyLoadableImagesBelowTheFold
- You might be able to lazy load that video there too.
Those links contain details and information on how to fix those.
Have you installed multiple apps?