diff --git a/diagrams/youtube/001 - syllabus.png b/diagrams/youtube/001 - syllabus.png
index 14bad417..3ddd3979 100644
Binary files a/diagrams/youtube/001 - syllabus.png and b/diagrams/youtube/001 - syllabus.png differ
diff --git a/diagrams/youtube/002 - what is react.png b/diagrams/youtube/002 - what is react.png
index 5b2badcf..3cecd648 100644
Binary files a/diagrams/youtube/002 - what is react.png and b/diagrams/youtube/002 - what is react.png differ
diff --git a/diagrams/youtube/003 - ecosystem.png b/diagrams/youtube/003 - ecosystem.png
index 4340d173..6f54cde5 100644
Binary files a/diagrams/youtube/003 - ecosystem.png and b/diagrams/youtube/003 - ecosystem.png differ
diff --git a/diagrams/youtube/004 - mockup.png b/diagrams/youtube/004 - mockup.png
index 4e3c9d41..b8567079 100644
Binary files a/diagrams/youtube/004 - mockup.png and b/diagrams/youtube/004 - mockup.png differ
diff --git a/diagrams/youtube/006 - webpack.png b/diagrams/youtube/006 - webpack.png
index b0525d09..5021e5c2 100644
Binary files a/diagrams/youtube/006 - webpack.png and b/diagrams/youtube/006 - webpack.png differ
diff --git a/diagrams/youtube/007 - flow.png b/diagrams/youtube/007 - flow.png
index ffe8f3d1..98bcda2a 100644
Binary files a/diagrams/youtube/007 - flow.png and b/diagrams/youtube/007 - flow.png differ
diff --git a/diagrams/youtube/008 - many files.png b/diagrams/youtube/008 - many files.png
index 27c570c9..94120da1 100644
Binary files a/diagrams/youtube/008 - many files.png and b/diagrams/youtube/008 - many files.png differ
diff --git a/diagrams/youtube/009 - single file.png b/diagrams/youtube/009 - single file.png
index db060feb..bd9bd069 100644
Binary files a/diagrams/youtube/009 - single file.png and b/diagrams/youtube/009 - single file.png differ
diff --git a/diagrams/youtube/010 - es2015.png b/diagrams/youtube/010 - es2015.png
index 6a2ca564..e528daa3 100644
Binary files a/diagrams/youtube/010 - es2015.png and b/diagrams/youtube/010 - es2015.png differ
diff --git a/diagrams/youtube/011 - create-react-app.png b/diagrams/youtube/011 - create-react-app.png
index 6ad319c5..52a27768 100644
Binary files a/diagrams/youtube/011 - create-react-app.png and b/diagrams/youtube/011 - create-react-app.png differ
diff --git a/diagrams/youtube/012 - path to content.png b/diagrams/youtube/012 - path to content.png
index ed9c25b1..312de481 100644
Binary files a/diagrams/youtube/012 - path to content.png and b/diagrams/youtube/012 - path to content.png differ
diff --git a/diagrams/youtube/013 - import statements.png b/diagrams/youtube/013 - import statements.png
index c93ae91d..9b08ea9b 100644
Binary files a/diagrams/youtube/013 - import statements.png and b/diagrams/youtube/013 - import statements.png differ
diff --git a/diagrams/youtube/014 - separate libs.png b/diagrams/youtube/014 - separate libs.png
index 9cf7be70..9804d501 100644
Binary files a/diagrams/youtube/014 - separate libs.png and b/diagrams/youtube/014 - separate libs.png differ
diff --git a/diagrams/youtube/015 - class vs instance.png b/diagrams/youtube/015 - class vs instance.png
index 6469afaf..35018429 100644
Binary files a/diagrams/youtube/015 - class vs instance.png and b/diagrams/youtube/015 - class vs instance.png differ