@adasiko - Your information was a key part of my solving my webcam problem.
just to add some details for others who may be less technical.
ever volunteered the solution in a simple form.
to make your webcam work in Opera browser:
(1st half of the solution:)
open your SNAPS (software) GUI
find Opera in the list of installed SW (click on it)
click on the Permissions tab
verify Opera is allowed to talk to your webcam & bonjour devices
(2nd half of the solution:)
in a terminal window enter
'snap interfaces chromium-ffmpeg'
it will give you a list, you need to patch the connections between the one listed as "opera" and the last one in the list
'snap connect opera:chromium-ffmpeg-95241 chromium-ffmpeg:chromium-ffmpeg-98516'
the numbers will be different depending on the various version you are using
*** it is okay if you use trial and error process to keep patching connections until it work.