Jupyter video_files param update (#470)

Co-authored-by: Wojciech Merynda <[email protected]>

Author: aleksandercwikla

rec_to_nwb/notebooks/nwb_generation.ipynb

@@ -89,6 +89,7 @@
     "    data_path='../test/test_data/',\n",
     "    dates=['20190718'],\n",
     "    nwb_metadata=metadata,\n",
+    "    video_directory='../test/test_data/beans/raw/20190718/',\n",
     ")"
    ]
   },
@@ -144,9 +145,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.4"
+   "version": "3.7.6"
   }
  },
  "nbformat": 4,
  "nbformat_minor": 2
-}
+}