Cannot get embed to display video on my website

API
6

Fron the linked docs

<iframe
    src="https://clips.twitch.tv/embed?clip=<slug>&parent=streamernews.example.com"
    height="<height>"
    width="<width>"
    allowfullscreen="<allow full screen>">
</iframe>

From yoir OP

        <iframe
           src="https://clips.twitch.tv/embed?clip=ReliableColdbloodedKuduDxAbomb-4gw58pm3M1lvaj1A"
           height="360"
           width="640"
           allowfullscreen="true" autoplay= "false" SameSite=None>
        </iframe>

You are missing a &parent=exmample.com from the iframe src where example.com would be your domain

Your claim here only applies whe using embed everywhere, the JS Lib Twitch provides for embedding live streams and vods but NOT clips. For clips you have to add the parent manually.

Docs are specically

Iframe Attributes

Name Type Description
allowfullscreen boolean If true, the player can go full screen.
clip string A globally unique string called a slug, by which clips are referenced.
height number or string Height of the embedded window, in pixels. This can be expressed as a percentage, by passing a string like 50%. Recommended minimum: 300.
parent string (required) Domain(s) that will be embedding Twitch. You must have one parent key for each domain your site uses.

Where parent is appened to the iFrame src (rather than an attribute) as per the example