Minor improvements, comments; fix Vinfo -d.
diff --git a/Demo/sgi/video/VFile.py b/Demo/sgi/video/VFile.py
index 2febd5a..5b9cd01 100755
--- a/Demo/sgi/video/VFile.py
+++ b/Demo/sgi/video/VFile.py
@@ -33,8 +33,9 @@
 # init(filename)
 # initfp(fp, filename)
 # rewind()
-# getframe()
-# skipframe()
+# getnextframe()
+# skipnextframe()
+# (and many more)
 #
 # The following read-only data members provide public information:
 # version