YouTube video about learning languages
I just discovered this video. It's long but quite interesting. It has tips for learning a variety of languages. And...there is a very brief mention about Luis at around 29:30.
You might also take a look at Alexander Arguelles(especially), Moses McCormick, Richard Simcott, Steve Kaufmann or Luca. They all make interesting videos about polyglottery.
Thanks for posting these names. I checked them out and bookmarked them. Very interesting. :)