diff --git a/doc/conf.py b/doc/conf.py
index 9eda248a..12c2aaca 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -37,8 +37,6 @@ extensions = [
     'sphinx.ext.mathjax',
     'sphinx.ext.napoleon',
     'sphinx.ext.graphviz',
-    'sphinxcontrib.youtube',
-    'sphinxcontrib.slide',
     #'sphinx.ext.pngmath',
     #'sphinxcontrib.tikz',
     #'rinoh.frontend.sphinx',
diff --git a/doc/installation.rst b/doc/installation.rst
index 8631e608..4817f356 100644
--- a/doc/installation.rst
+++ b/doc/installation.rst
@@ -55,7 +55,7 @@ The environment can be installed and activated using
 
     and then install the environment with
 
-    .. coda:: bash
+    .. code:: bash
 
         mamba env create -f environment.yaml
 
diff --git a/doc/introduction.rst b/doc/introduction.rst
index c6debbd4..64d79a9f 100644
--- a/doc/introduction.rst
+++ b/doc/introduction.rst
@@ -4,9 +4,11 @@
  Introduction
 ##########################################
 
-.. youtube:: ty47YU1_eeQ
+.. raw:: html
 
-.. slide:: https://docs.google.com/presentation/d/e/2PACX-1vQGQZD7KIVdocRZzRVu8Uk-JC_ltEow5zjtIarhyws46IMJpaqGuux695yincmJA_i5bVEibEs7z2eo/pub?start=false&loop=true&delayms=3000
+    <iframe width="832" height="468" src="https://www.youtube.com/embed/ty47YU1_eeQ" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+
+Find the introductory slides `here <https://docs.google.com/presentation/d/e/2PACX-1vQGQZD7KIVdocRZzRVu8Uk-JC_ltEow5zjtIarhyws46IMJpaqGuux695yincmJA_i5bVEibEs7z2eo/pub?start=false&loop=true&delayms=3000>`_.
 
 Workflow
 =========
diff --git a/doc/tutorial.rst b/doc/tutorial.rst
index 26a2cf85..fc521a8b 100644
--- a/doc/tutorial.rst
+++ b/doc/tutorial.rst
@@ -1,10 +1,16 @@
+..
+  SPDX-FileCopyrightText: 2016-2019 The Atlite Authors
+  SPDX-License-Identifier: CC-BY-4.0
+
 .. _tutorial:
 
 #####################
 Tutorial
 #####################
 
-.. youtube:: mAwhQnNRIvs
+.. raw:: html
+
+    <iframe width="832" height="468" src="https://www.youtube.com/embed/mAwhQnNRIvs" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
 
 Before getting started with **PyPSA-Eur** it makes sense to be familiar
 with its general modelling framework `PyPSA <https://pypsa.readthedocs.io>`_.
@@ -40,7 +46,7 @@ The model can be adapted to only include selected countries (e.g. Germany) inste
 
 .. literalinclude:: ../config.tutorial.yaml
    :language: yaml
-   :lines: 15
+   :lines: 16
    
 Likewise, the example's temporal scope can be restricted (e.g. to a single month).
 
diff --git a/environment.docs.yaml b/environment.docs.yaml
index a7bbd4e2..19c3d224 100755
--- a/environment.docs.yaml
+++ b/environment.docs.yaml
@@ -50,6 +50,3 @@ dependencies:
     - cdsapi
     - sphinx
     - sphinx_rtd_theme
-    - sphinxcontrib-youtube
-    - sphinxcontrib-slide
-    - urlparse