diff --git a/index.bs b/index.bs
index 61e2649..b38b443 100644
--- a/index.bs
+++ b/index.bs
@@ -447,57 +447,6 @@ dictionary RTCEncodedFrameMetadata {
     </dd>
 </dl>
 
-## <dfn enum>RTCEncodedVideoFrameType</dfn> dictionary ## {#RTCEncodedVideoFrameType}
-<pre class="idl">
-// New enum for video frame types. Will eventually re-use the equivalent defined
-// by WebCodecs.
-enum RTCEncodedVideoFrameType {
-    "empty",
-    "key",
-    "delta",
-};
-</pre>
-<table dfn-for="RTCEncodedVideoFrameType" class="simple">
-  <caption>Enumeration description</caption>
-    <thead>
-        <tr>
-            <th>Enum value</th><th>Description</th>
-        </tr>
-    </thead>
-    <tbody>
-        <tr>
-            <td>
-                <dfn enum-value>empty</dfn>
-            </td>
-            <td>
-                <p>
-                    This frame contains no data.
-                </p>
-            </td>
-        </tr>
-        <tr>
-            <td>
-                <dfn enum-value>key</dfn>
-            </td>
-            <td>
-                <p>
-                    This frame can be decoded without reference to any other frames.
-                </p>
-            </td>
-        </tr>
-        <tr>
-            <td>
-                <dfn enum-value>delta</dfn>
-            </td>
-            <td>
-                <p>
-                    This frame references another frame and can not be decoded without that frame.
-                </p>
-            </td>
-        </tr>
-    </tbody>
-</table>
-
 ## <dfn dictionary>RTCEncodedVideoFrameMetadata</dfn> dictionary ## {#RTCEncodedVideoFrameMetadata}
 <pre class="idl">
 dictionary RTCEncodedVideoFrameMetadata : RTCEncodedFrameMetadata {
@@ -552,12 +501,11 @@ dictionary RTCEncodedVideoFrameOptions {
     RTCEncodedVideoFrameMetadata metadata;
 };
 
-// New interfaces to define encoded video and audio frames. Will eventually
-// re-use or extend the equivalent defined in WebCodecs.
+// New interfaces to define RTC specific encoded video and audio frames used by RTCRtpScriptTransform.
 [Exposed=(Window,DedicatedWorker), Serializable]
 interface RTCEncodedVideoFrame {
     constructor(RTCEncodedVideoFrame originalFrame, optional RTCEncodedVideoFrameOptions options = {});
-    readonly attribute RTCEncodedVideoFrameType type;
+    readonly attribute EncodedVideoChunkType type;
     attribute ArrayBuffer data;
     RTCEncodedVideoFrameMetadata getMetadata();
 };