If I change the Roku account password on the web, will I have to go to every one of my Roku's and re-log it in using the new password? If I don't, will it stop working?
Short answer - no. Your Roku devices are linked to a Roku account. The password is only used to log into your Roku account online. Changing the password doesn't affect what account each device is linked to.
theres one way to find out.