Restore YT link for 2006/sykes1 for now

Embedding videos has to be sorted out another time. Instead the
things-todo.md file has been updated for this.

2006/sykes1/README.md

@@ -88,14 +88,7 @@ puzzles in wikipedia](http://en.wikipedia.org/wiki/Bedlam_cube).
 Some instructions on how to make your own cube are in the included file
 [bedlam-cubes.pdf](bedlam-cubes.pdf).
 
-Finally, you can watch it being solved:
-<tbody class="d-block">
-    <tr class="d-block">
-    <video src="solving-bedlam-cube.mp4" data-canonical-src="solving-bedlam-cube.mp4" controls="controls" muted="muted" class="d-block rounded-bottom-2 border-top width-fit" style="max-height:640px; min-height: 200px"></video>
-      </td>
-    </tr>
-</tbody>
-...taken from <https://www.youtube.com/watch?v=a8s1AcYMLBc>.
+Finally, you can watch it being solved at <https://www.youtube.com/watch?v=a8s1AcYMLBc>.
 
 Actually the cube is very hard to do by hand by just trying to fit it
 together.  I have not known anyone to solve it in this way - you would