Originally posted by Pekka Ketonen:
...introduce the basic sleights in card magic and some tricks to go with them a la Royal Road or Card College in my native language ...
The guy who wrote Royal Road may be gone, and most of the folks who contributed to Royal Road and Expert Card Technique might also be gone... so it is difficult to seek proper permissions and give proper respect to those whose works you seek to discuss.
The guy who wrote the Card College books is still with us and may have some issues with you translating his work and selling it. He might be open to some offer and perhaps even make arrangements to help with the videos if you are going that way.
However, just what basics are YOURS to offer? Alex Elmsley is still with us, and much work on the classic pass is around because folks like Geoff Latta spent many years working on the thing. The thing we call Marlo's TILT is a result of a few people's work and of them, Ken Krenzel and Howie Schwarzman are still around. If you want to seek out proper permissions on material, start with those named in the works, and it's safer to presume the material is 'borrowed' unless properly cited. Seek out folks like Paul Chosse, Wesley James, Richard Hatch and Bill Palmer for proper historical citations.
Good thing you are not doing a coin book. Though Milt Kort and Jimmy Buffalo and J. B. Bobo are gone, folks like Al Schneider, David Roth, Harvey Rosenthal, Sol Stone, Geoff Latta, David Neighbors ... are with us and still developing material. The good side of this is they are approachable and also concerned with the history of the moves and magic.
Just what is public domain in magic? The material in Discoverie of Witchcraft
, in its non technical descriptions? How about the contents of the Robert-Houdin book? or the Professor Hoffmann books? Not sure where one could draw the lines between the basic descriptions and the modern technical re-workings.
Then again... perhaps it is better to learn from the tomes. There is much to be gained in filling in details from sparse descriptions. Perhaps we could do with a video discussing the material in the Robert-Houdin Secrets of Conjuring book.