diff --git a/examples/alpha.json5 b/examples/alpha.json5
index 0598a31..adf004a 100644
--- a/examples/alpha.json5
+++ b/examples/alpha.json5
@@ -4,11 +4,11 @@
   clips: [
     { duration: 2, layers: [
       { type: 'video', path: './assets/lofoten.mp4', cutFrom: 0.4, cutTo: 2 },
-      { type: 'video', path: './assets/dancer1.webm', cutFrom: 0, cutTo: 6 },
+      { type: 'video', path: './assets/dancer1.webm', resizeMode: 'contain', cutFrom: 0, cutTo: 6 },
     ] },
     { layers: [
       { type: 'video', path: './assets/lofoten.mp4', cutFrom: 0.4, cutTo: 2 },
-      { type: 'video', path: './assets/dancer1.webm' },
+      { type: 'video', path: './assets/dancer1.webm', resizeMode: 'contain' },
     ] },
   ],
 }
diff --git a/examples/lowerThirds1Line.json5 b/examples/lowerThirds1Line.json5
index dc5ce0d..a37a4e4 100644
--- a/examples/lowerThirds1Line.json5
+++ b/examples/lowerThirds1Line.json5
@@ -4,8 +4,8 @@
   outPath: './lowerThirds1Line.mp4',
   clips: [
     { duration: 7, layers: [
-      { type: 'fill-color', color: '#000' },
-      { type: 'video', path: 'assets/lowerthirds/UHD_DMGMORI_Lwr3rd_1Line.mov' },
+      { type: 'fill-color', color: '#555' },
+      { type: 'video', path: 'assets/lowerthirds/UHD_DMGMORI_Lwr3rd_1Line.mov', resizeMode: 'contain' },
       { type: 'slide-in-text', text: 'Lower Line Regular Source Text', position: { x: 0.035, y: 0.930, originX: 'left', originY: 'bottom' }, color: '#000', fontSize: 0.021, charSpacing: 0.025, fontPath: './assets/lowerthirds/FF DIN Pro Light.otf' },
     ] },
   ],
diff --git a/examples/lowerThirds2Lines.json5 b/examples/lowerThirds2Lines.json5
index 191ffc2..ebc85d3 100644
--- a/examples/lowerThirds2Lines.json5
+++ b/examples/lowerThirds2Lines.json5
@@ -4,8 +4,8 @@
   outPath: './lowerThirds2Lines.mp4',
   clips: [
     { duration: 7, layers: [
-      { type: 'fill-color', color: '#000' },
-      { type: 'video', path: 'assets/lowerthirds/UHD_DMGMORI_Lwr3rd_2Lines.mov' },
+      { type: 'fill-color', color: '#555' },
+      { type: 'video', path: 'assets/lowerthirds/UHD_DMGMORI_Lwr3rd_2Lines.webm', resizeMode: 'contain' },
       { type: 'slide-in-text', text: 'Upper Line Bold Source Text', position: { x: 0.035, y: 0.877, originX: 'left', originY: 'bottom' }, color: '#000', fontSize: 0.021, charSpacing: 0.03, fontPath: './assets/lowerthirds/FF DIN Pro Medium.otf' },
       { type: 'slide-in-text', text: 'Lower Line Regular Source Text', position: { x: 0.035, y: 0.930, originX: 'left', originY: 'bottom' }, color: '#000', fontSize: 0.021, charSpacing: 0.025, fontPath: './assets/lowerthirds/FF DIN Pro Light.otf' },
     ] },
diff --git a/examples/visibleFromUntil.json5 b/examples/visibleFromUntil.json5
index 7f90f55..32d2069 100644
--- a/examples/visibleFromUntil.json5
+++ b/examples/visibleFromUntil.json5
@@ -4,7 +4,7 @@
   clips: [
     { duration: 2, layers: [
       { type: 'video', path: './assets/lofoten.mp4', cutFrom: 0.4, cutTo: 2 },
-      { type: 'video', path: './assets/dancer1.webm', cutFrom: 0, cutTo: 6, visibleFrom: 0.5, visibleUntil: 1 },
+      { type: 'video', path: './assets/dancer1.webm', resizeMode: 'contain', cutFrom: 0, cutTo: 6, visibleFrom: 0.5, visibleUntil: 1 },
     ] },
     { duration: 2, layers: [
       { type: 'video', path: './assets/lofoten.mp4', cutFrom: 7.5, cutTo: 10.5 },