iPhone 17 Pro Max: Edited slow-motion videos won't upload

Dear Apple Technical Support,

I am reporting a recurring issue on my iPhone 17 Pro Max related to video editing and uploading.

Device: iPhone 17 Pro Max

User: Attila ***

Apple ID: ***

Issue description:

After editing a video and applying slow-motion adjustments (via the Photos app editor), the video cannot be uploaded to social media platforms. During the upload process, the status shows “Preparing” with a spinning loading circle, and the app eventually freezes completely. The upload never completes.

The issue occurs consistently with edited slow-motion videos. Non-edited videos appear to upload normally.

Troubleshooting steps already performed:

– Device restart

– Full device reset

– Re-editing the video from scratch

– Retrying upload multiple times

The issue persists after these steps.

Please advise whether this may be related to video encoding, iOS processing, file corruption, or a known software bug. I would appreciate guidance on further diagnostics or recommended steps to resolve the issue.

Thank you for your assistance.

Kind regards,

Attila ***

***

[Edited by Moderator]