Add Load video data tutorial

PiperOrigin-RevId: 474592963

Author: tensorflower-gardener

site/en/tutorials/_toc.yaml

@@ -35,6 +35,9 @@ toc:
   section:
   - title: "Images"
     path: /tutorials/load_data/images
+  - title: "Video"
+    path: /tutorials/load_data/video
+    status: new
   - title: "CSV"
     path: /tutorials/load_data/csv
   - title: "NumPy"