Hi OrpheusXL
for the manual take a look here https://itch.io/t/539248/new-users-guide-to-flowscape-controls
or here ( on Steam ) https://steamcommunity.com/sharedfiles/filedetails/?id=1841499167
( they're probably the same , but as far as i can see, the latest updates are not included )
to save movies :
as a user of an nvidia graphics card you can use nvidias own "Shadowplay" ( ALT + F9 )
https://www.youtube.com/watch?time_continue=4&v=czGFyXd8kfo&feature=emb_logo