README: Tabulate the videos

Update the way the videos are presented. They are now tabulated and
presented as figures (e.g. captioned) rather than images. They also
now appear later in the files.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

README.rst

@@ -18,41 +18,6 @@ form-factor devices without a reset button, power switch, SWD debugger
 or UART. This allows us to confidently develop on sealed devices relying
 only on BLE for updates.
 
-Videos
-------
-
-.. image:: https://img.youtube.com/vi/lIo2-djNR48/0.jpg
-   :target: https://www.youtube.com/watch?v=lIo2-djNR48
-   :alt: wasp-os: Open source heart rate monitoring for Pine64 PineTime
-   :width: 320
-   :height: 240
-
-`Open source heart rate monitoring for Pine64 PineTime <https://www.youtube.com/watch?v=lIo2-djNR48>`_
-
-.. image:: https://img.youtube.com/vi/YktiGUSRJB4/0.jpg
-   :target: https://www.youtube.com/watch?v=YktiGUSRJB4
-   :alt: An M2 pre-release running on Pine64 PineTime
-   :width: 320
-   :height: 240
-
-`An M2 pre-release running on Pine64 PineTime <https://www.youtube.com/watch?v=YktiGUSRJB4>`_
-
-.. image:: https://img.youtube.com/vi/tuk9Nmr3Jo8/0.jpg
-   :target: https://www.youtube.com/watch?v=tuk9Nmr3Jo8
-   :alt: How to develop wasp-os python applications on a Pine64 PineTime
-   :width: 320
-   :height: 240
-
-`How to develop wasp-os python applications on a Pine64 PineTime <https://www.youtube.com/watch?v=tuk9Nmr3Jo8>`_
-
-.. image:: https://img.youtube.com/vi/kf1VHj587Mc/0.jpg
-   :target: https://www.youtube.com/watch?v=kf1VHj587Mc
-   :alt: Developing for Pine64 PineTime using wasp-os and MicroPython
-   :width: 320
-   :height: 240
-
-`Developing for Pine64 PineTime using wasp-os and MicroPython <https://www.youtube.com/watch?v=kf1VHj587Mc>`_
-
 Documentation
 -------------
 
@@ -101,6 +66,39 @@ which can run these commands automatically.
 As mentioned above there are many drivers and features still to be
 developed, see the :ref:`Roadmap` for current status.
 
+Videos
+------
+
+.. list-table::
+
+   * - .. figure:: https://img.youtube.com/vi/lIo2-djNR48/0.jpg
+          :target: https://www.youtube.com/watch?v=lIo2-djNR48
+          :alt: wasp-os: Open source heart rate monitoring for Pine64 PineTime
+          :width: 95%
+
+          `Open source heart rate monitoring for Pine64 PineTime <https://www.youtube.com/watch?v=lIo2-djNR48>`_
+
+     - .. figure:: https://img.youtube.com/vi/YktiGUSRJB4/0.jpg
+          :target: https://www.youtube.com/watch?v=YktiGUSRJB4
+          :alt: An M2 pre-release running on Pine64 PineTime
+          :width: 95%
+
+          `An M2 pre-release running on Pine64 PineTime <https://www.youtube.com/watch?v=YktiGUSRJB4>`_
+
+   * - .. figure:: https://img.youtube.com/vi/tuk9Nmr3Jo8/0.jpg
+          :target: https://www.youtube.com/watch?v=tuk9Nmr3Jo8
+          :alt: How to develop wasp-os python applications on a Pine64 PineTime
+          :width: 95%
+
+          `How to develop wasp-os python applications on a Pine64 PineTime <https://www.youtube.com/watch?v=tuk9Nmr3Jo8>`_
+
+     - .. figure:: https://img.youtube.com/vi/kf1VHj587Mc/0.jpg
+          :target: https://www.youtube.com/watch?v=kf1VHj587Mc
+          :alt: Developing for Pine64 PineTime using wasp-os and MicroPython
+          :width: 95%
+
+          `Developing for Pine64 PineTime using wasp-os and MicroPython <https://www.youtube.com/watch?v=kf1VHj587Mc>`_
+
 Screenshots
 -----------