This is an amazing solution to a problem I didn't even know I had!
Yes, VLC already had the capability, but before Steve pointed me to MySpeed I didn't really notice it or grasp the benefits.
Now I realize that it not only saves time but even improves my focus and absorption of the material. I really love it.
Together with my friend Joachim I've created a video to promote this solution. Besser Lernen in Deinem Tempo - YouTube
PS: Sorry it's only in German for now, you want subtitles?