From a certain date all my videos are rejected on the grounds for technical reasons. I totally disagree, the videos some of which did not present any problems. If the real motivation is for commercial reasons then I can accept, however, with detailed reasons. Producing videos costs time and money, and being rejected is very depressing.
This is a user-to-user community. Nobody here has any influence over what Adobe does.
Stock Reviewers must examine several hundred submissions daily. They don't have time to give detailed feedback to everyone. That's not their job. Their job is to approve or reject content based on Adobe Stock's established criteria. Without seeing the rejected assets, we can't comment on specific reasons why they may have been rejected except to say that they didn't meet Stock's quality standards. See links below.
(...), however, with detailed reasons.
Sorry to disagree. It is not Adobe's aim to make you a better videographer, but to offer to potential customers a wide range of high-quality assets to keep them paying the subscription price.
I agree, however, with you that rejections are depressing, especially if you are persuaded that the submissions are perfect. If, however, most of the submissions get a refusal, you should really get advice from an expert on your submissions.