What do these hand gestures mean?

After several minutes of trying these hand gestures out myself, and looking online, I still do not know the meanings of these gestures. However, I can tell you that the top half and the bottom half read from left to right and that they are pretty fluid motions, especially the bottom one.

I will continue to look on this website i have found if there is anything even remotely similar. I will edit this answer if I am successful.

EDIT:

hahaha, i wish you said "octave" sooner :p. i was looking at so many different hand languages (if that makes sense) :p i found a couple, but no matches. after a quick search on musical hand signs, i learned that the hand signs you posted each represent a musical note. and, if i'm not mistaken, the dots mean a full pause, so 4 beats maybe? i dunno :p

anyway, here it goes -

Mi [pause] Do(high)-Re-Do

So [pause] La-Fa-Ti

actually, it might be helpful just to look at my source, haha.

good luck!