iriunwebcam doesn't work on 20.04

Solution 1:

I had the same problem and also tested it in a VM with Ubuntu 20.04 and 19.10. Both worked right away. Then i tried it on my laptop again with a wired network connection because there was only a wired connection available in the VM and that worked also! After a lot of trying and searching to get it to work via the WIFI Adapter (i mostly work wireless), i ended up with setting the WIFI adapter name to default wlan0. To change the adapter name do this:

1. Open /etc/default/grub
2. Add "net.ifnames=0" to the line GRUB_CMDLINE_LINUX_DEFAULT. On my system, it now looks like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash net.ifnames=0"
3. Save the file
4. Run update-grub and reboot your machine
5. You might have to reconnect to your network and enter your passphrase

Solution 2:

you can also try adding the rule in your firewall settings with the command.
ufw allow from <your-device-local-ip>.
it should start from '192.x.x.x' something in that line.
it worked for me