Add 0.3 legal hold demo to the docs (#7044)

* Add 0.3 demo to the docs

* Added sneak peek video

source/comply/legal-hold.rst

@@ -15,7 +15,16 @@ Primary use cases include:
 
 Mattermost is used as a secure collaboration hub by technical and operational teams, with critical documents and data shared on a daily basis. Thus, legal hold is a key requirement for Enterprises and public sector organizations who have deployed Mattermost for their teams, to meet compliance & auditory requirements while minimizing risk.
 
-Below are step-by-step instructions on how to carry out a legal hold for Mattermost with XML-formatted data, Amazon S3 file storage, and archiving and compliance tools, such as `Smarsh <https://www.smarsh.com/>`__.
+Legal hold demo (Sneak Peek)
+----------------------------
+
+Check out this `YouTube sneak peek demo <https://youtu.be/86c8NoOxlQw>`_ to learn about Mattermost's legal hold workflow.
+
+.. raw:: html
+
+   <iframe width="560" height="315" src="https://www.youtube.com/embed/86c8NoOxlQw" alt="Mattermost legal hold workflow" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
+
+Below are step-by-step instructions on how to carry out a legal hold for Mattermost with XML-formatted data, Amazon S3 file storage, and archiving and compliance tools, such as `Smarsh <https://www.smarsh.com/>`_.
 
 How to carry out a legal hold
 -----------------------------
@@ -70,7 +79,7 @@ The exports include information on channel member history at the time the messag
 3 - Leverage compliance API in your DLP tool of choice
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Connect it directly to the Amazon S3 bucket where compliance exports are stored. Our recommended DLP tool of choice is `Smarsh <https://www.smarsh.com/>`__. Learn more about their legal hold & e-discovery processes in their `documentation <https://www.smarsh.com/platform/enterprise/discovery>`__.
+Connect it directly to the Amazon S3 bucket where compliance exports are stored. Our recommended DLP tool of choice is `Smarsh <https://www.smarsh.com/>`_. Learn more about their legal hold & e-discovery processes in their `documentation <https://www.smarsh.com/platform/enterprise/discovery>`_.
 
 You may optionally also use other tools that connect with Amazon S3, such as Active360, AwareHQ, Onna, or Trellix, though our team will be able to provide limited support using these tools.