I am not sure why you need email address, better you could just ask for the link of the profile of shotcut forum or YouTube discuss tab, then you might also be able to contact them.
I will not be giving my personal email, can I use my public email?
ONE MORE THING
You can also use the polls option from the gear icon in the text editor to create a poll for forum users.
HERE IS AN EXAMPLE OF A POLL THAT I MADE:-
P. S:- It became a very highly voted pole, and it was my first, didn’t expect this much voters.