.. . . . . nm91_sou_vid . ..

.
. . . . . . . . . mon_0 ==> mon_0

. . .
mon_txt . . . . . . .

mon_txt2

----------------aud-----------------------

mon_txt3

----------------video-----------------------

--------------------------------------

canv to vid
https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/captureStream
https://addpipe.com/blog/mediarecorder-api/
https://www.w3schools.com/tags/ref_av_dom.asp