<iframe src="https://iframe.videodelivery.net/e25b8ae5f2d9cafba7ad105433b3e0fa?preload=true?poster=https%3A%2F%2Fvideodelivery.net%2Fe25b8ae5f2d9cafba7ad105433b3e0fa%2Fthumbnails%2Fthumbnail.jpg%3Ftime%3D2s" style="border: none; position: absolute; top: 0; height: 100%; width: 100%;" allow="accelerometer; gyroscope; autoplay; encrypted-media; picture-in-picture;" allowfullscreen="true"></iframe>
I’ve tried it multiple ways and have been troubleshooting for a while but nothing I do seems to show a thumbnail (poster).
I feel I’m missing something fundamental but the documentation has minimal examples.