@Zenpony It's changed from left hand to right hand, since most of people are right-handed. Throwing it in the air and then catch it again is an indication showing that the sword player has the ability to catch his/her sword if there is a need to change hands or if the sword is knocked away by the opponent from the hand. Hope this answer helps.
@goldhugo007 thank you for taking the time to reply. Makes perfect sense. I performed the 42 sword form in a local Martial Arts tournament this Oct. My skill is not yet good enough to toss into the air for the hand change. Someday.
I have a question to ask respectfully. At second 48, why do you release the sword into the air to catch with the opposite hand, instead of transferring hands closely? What is the application of that transition? It seems to my untrained eye to be a dangerous change.
