comment corrected and youtube link added

Author: Heckmann

mevislab.github.io/content/tutorials/basicmechanisms/macromodules/itemmodelview.md

@@ -172,7 +172,7 @@ gNextId = 0
 ```
 {{</highlight>}}
 
-We need *mevis.MLAB* and we define the attributes of our resulting view.
+We need to import *mevis.MLAB* and we define the attributes of our resulting view.
 
 The unique *id* is an increasing *Integer* and we can now initialize our model.
 

mevislab.github.io/content/tutorials/visualization/pathtracer/pathtracerexample1.md

@@ -14,6 +14,8 @@ menu:
 ---
 # Example 6.1: Volume Rendering vs. Path Tracer
 
+{{< youtube "E0H87Cimu_M">}}
+
 ## Introduction
 In this example you develop a network to show some differences between volume rendering and the MeVisLab Path Tracer. You will visualize the same scene using both 3D rendering techniques and some of the modules for path tracing.