--- /dev/null
+webm libvpx-vp9
+# YOUTUBE - Ultra High Definition video
+# More VP9 options if choose format of webm
+# Refer to section 3.4 in Features5.pdf
+# 3840x2160 (50 or 60 frames per second)
+bitrate=18000k
+minrate=9000k
+maxrate=26100k
+tile-columns=4
+g=240
+threads=24
+quality=good
+crf=15
+speed=4