<Video carousel with amp-carousel> Some videos are not available in the carousel

### Description

Some videos are not available in the carousel

### Reproduction Steps

1. Use the playground link https://playground.amp.dev/?url=https%3A%2F%2Fpreview.amp.dev%2Fdocumentation%2Fexamples%2Fmultimedia-animations%2Fvideo_carousels_with_amp-carousel&format=websites&_gl=1*1kgsbzt*_ga*YW1wLW83ZWlnQnRSNnV0d0lWS2dEWG1YSmc.&preview=true
2. Click on the arrow buttons
3. Swipe carousel in both directions

Actual result: Some videos are not available in the carousel
https://photos.app.goo.gl/kyQKoqxMv6DJEkS29

Expected result: All videos should be present in carousel

### Relevant Logs

_No response_

### Browser(s) Affected

Chrome, Firefox, Safari

### OS(s) Affected

_No response_

### Device(s) Affected

_No response_

### AMP Version Affected

_No response_