Instructions: Open Safari dev tools → Network tab. Reload this page. Look for requests tovz-ddc791ad-cd3.b-cdn.netand check their HTTP status and Referer header.
Diagnostic State
Function call: ⏳ Loading...
Embed URL: ❌ Missing
Iframe load event: loading
What to look for in Network tab
- Request to
iframe.mediadelivery.net/embed/... — should be 200 - Request to
vz-ddc791ad-cd3.b-cdn.net/.../playlist.m3u8 — check status (200 = OK, 403 = Referer blocked) - Request to
vz-ddc791ad-cd3.b-cdn.net/.../thumbnail.jpg — check status - For any 403 request, check the Referer request header — is it present or missing?
Published site comparison
Also test: https://artley-canine-archive.base44.app/watch/course/walk-like-a-boss
If the video plays on the published site but not in this preview, the issue is specific to the Base44 preview iframe environment.