Skip README.md GitHub video link (which is not handled correctly) in Sphinx docs. Still works when viewing README.md in GitHub [skip ci].

hmakelin · hmakelin · commit 76a458c1d94f · 2022-10-15T10:32:07.000+01:00
diff --git a/docs/pages/get_started.rst b/docs/pages/get_started.rst
@@ -1,7 +1,9 @@
 **************************************************
 Get Started
 **************************************************
+..
+    Skip GitHub video link (:start-after: .mp4)
+
 .. include:: ../../README.md
     :parser: myst_parser.sphinx_
-
-
+    :start-after: .mp4
