add separate video loader class

videoloader_test.py

@@ -0,0 +1,12 @@
+from video_loader import VideoLoader
+import cv2
+from cv2util import to_8_bit_image
+
+projects_path = "C:\\UntrackedGit\\opencv_test\\him_projects"
+loader = VideoLoader(projects_path)
+
+for recording in loader.get_all_recordings():
+    frames = loader.extract_frames(recording)
+    for frame in frames:
+        cv2.imshow("test", frame)
+        cv2.waitKey(1)