For any of you who might be interested:
Earlier this summer, I posted a 37 minute video (the first in a series, if we are able to continue) about the grammar of Nicaraguan Sign Language. This video is presented entirely in ISN (with lots of SignWriting) and with English captioning. There were a few captioning errors (which is annoying for me, but my fault), and somehow we edited in a mistaken clip (showing ISN as "I-N-S").
Anyway, we have re-released the whole thing, but now with Spanish captions. The first minute is a little shaky (editing issues), but the rest is smooth.
I hope you find this of some value.
Here is the link to the Spanish version:
Here is the link to the English version (until I get around to correcting it):