chore(rebuild): Update CloudIdentifier explainer (#428)

* Add demo page & developer feedback to cloud identifier explainer

* Include video

* Embed video hosted via gDrive

* Add table of contents

* Fix ToC

SHA: 5e984d4
Reason: push, by @a-sully

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

index.html

@@ -4,9 +4,9 @@
   <title>File System Access</title>
   <meta content="width=device-width, initial-scale=1, shrink-to-fit=no" name="viewport">
   <link href="https://www.w3.org/StyleSheets/TR/2021/cg-draft" rel="stylesheet">
-  <meta content="Bikeshed version b06c00b8e, updated Tue Jul 11 13:41:16 2023 -0700" name="generator">
+  <meta content="Bikeshed version 6edc88947, updated Thu Aug 17 11:18:09 2023 -0700" name="generator">
   <link href="https://wicg.github.io/file-system-access/" rel="canonical">
-  <meta content="d8f5556db5125a91a48273b809f0b2acaf77a0a2" name="document-revision">
+  <meta content="5e984d41822faadf83b54817eebc6d2906360e8e" name="document-revision">
 <style>
 .domintro dt {
     font-family: Menlo, Consolas, "DejaVu Sans Mono", Monaco, monospace;
@@ -907,7 +907,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2021/logos/W3C" width="72"> </a> </p>
    <h1 class="p-name no-ref" id="title">File System Access</h1>
-   <p id="w3c-state"><a href="https://www.w3.org/standards/types#CG-DRAFT">Draft Community Group Report</a>, <time class="dt-updated" datetime="2023-07-12">12 July 2023</time></p>
+   <p id="w3c-state"><a href="https://www.w3.org/standards/types#CG-DRAFT">Draft Community Group Report</a>, <time class="dt-updated" datetime="2023-08-28">28 August 2023</time></p>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version: