Stream mp4 url not working (Live instant clipping)

Hello I'm following this guide https://developers.cloudflare.com/stream/stream-live/live-instant-clipping/ and everything works fine. I get the hls url just fine from the time I want. Thumbnails working just fine. But when I get to the part of the mp4 url download it doesnt work.

Im using this template from the docs:
https://customer-<CODE>.cloudflarestream.com/<VIDEO_ID>/clip.mp4?time=427s&duration=60s

This returns a mp4 but it doesnt work. It is just black video and I can just see the last frame. I cannot "browse" through the video. And in this example the file is 7:06 minutes long. First photo is the web view. The second photo is the windows video player when I download the file. Do I need to read the video in a special way? Or is the URL not working?
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Cloudflare Docs
Stream supports generating clips of live streams and recordings so creators and viewers alike can highlight short, engaging pieces of a longer broadcast or recording. Live instant clips can be created by end users and do not result in additional storage fees or new entries in the video library.
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