Finding my Webcam

I am running Fedora 32. I have a Hercules Dualpix camera plugged in.
If I look at dmesg, the camera is seen.

[    1.246637] usb 1-5: new high-speed USB device number 2 using ehci-pci
[    1.254636] usb 2-2: new high-speed USB device number 2 using ehci-pci
[    1.376967] usb 1-5: New USB device found, idVendor=06f8, idProduct=3003, bcdDevice= 1.00
[    1.376969] usb 1-5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    1.376971] usb 1-5: Product: Hercules Dualpix HD Microphone
[    1.376972] usb 1-5: Manufacturer: Hercules Dualpix HD Webcam

If i run lsusl I get

[ian@localhost ~]$ lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 006: ID 1a2c:2124 China Resource Semico Co., Ltd Keyboard
Bus 002 Device 003: ID 05e3:0605 Genesys Logic, Inc. Hub
Bus 002 Device 005: ID 04f9:0119 Brother Industries, Ltd MFC-9660
Bus 002 Device 004: ID 047f:0ca1 Plantronics, Inc. USB DSP v4 Audio Interface
Bus 002 Device 002: ID 0bda:5411 Realtek Semiconductor Corp. RTS5411 Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 06f8:3003 Guillemot Corp. Hercules Dualpix HD Microphone
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 006 Device 002: ID 045e:0084 Microsoft Corp. Basic Optical Mouse
Bus 006 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

So, the device is seen as a microphone, but not (apparently) as a camera.
If I use Skype or Microsoft Teams it lists as my camera the Dualpix Microphone. The only picture it gets with the microphone is blackness!
/dev/video0 appears to be empty
Is there anything I can tweak to get it to recognise the Webcam as a camera?

I think you have two devices, a camera and a mic. probably lspci will give you more info.
probably: https://ubuntuforums.org/showthread.php?t=1047050

lspci -tvvv
-[0000:00]-+-00.0  Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Root Complex
           +-01.0  Advanced Micro Devices, Inc. [AMD/ATI] Richland [Radeon HD 8470D]
           +-01.1  Advanced Micro Devices, Inc. [AMD/ATI] Trinity HDMI Audio Controller
           +-04.0-[01]----00.0  Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
           +-10.0  Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller
           +-11.0  Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [IDE mode]
           +-12.0  Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller
           +-12.2  Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller
           +-13.0  Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller
           +-13.2  Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller
           +-14.0  Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller
           +-14.2  Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller
           +-14.3  Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge
           +-14.4-[02]--
           +-14.5  Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller
           +-18.0  Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 0
           +-18.1  Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 1
           +-18.2  Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 2
           +-18.3  Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 3
           +-18.4  Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 4
           \-18.5  Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 5

did you try to follow the link?

I did follow the link. I read that uvc should already be installed and that there was no need to install anything.
I ran lsmod and that seems to show that uvc is NOT running on my system.
I installed guvcview and that was able to access the camera.
I ran vlc and that was able to access the camera.
I have installed v4l-utils and can see this

$ v4l2-ctl --all
Driver Info:
	Driver name      : ov534_9
	Card type        : Hercules Dualpix HD Microphone
	Bus info         : usb-0000:00:12.2-5
	Driver version   : 5.8.12
	Capabilities     : 0x85200001
		Video Capture
		Read/Write
		Streaming
		Extended Pix Format
		Device Capabilities
	Device Caps      : 0x05200001
		Video Capture
		Read/Write
		Streaming
		Extended Pix Format
Priority: 2
Video input : 0 (ov534_9: ok)
Format Video Capture:
	Width/Height      : 1280/1024
	Pixel Format      : 'JPEG' (JFIF JPEG)
	Field             : None
	Bytes per Line    : 1280
	Size Image        : 492110
	Colorspace        : JPEG
	Transfer Function : Default (maps to sRGB)
	YCbCr/HSV Encoding: Default (maps to ITU-R 601)
	Quantization      : Default (maps to Full Range)
	Flags             : 
Streaming Parameters Video Capture:
	Frames per second: invalid (0/0)
	Read buffers     : 2

User Controls

                     brightness 0x00980900 (int)    : min=0 max=15 step=1 default=7 value=7 flags=slider
                       contrast 0x00980901 (int)    : min=0 max=15 step=1 default=3 value=3 flags=slider
                     saturation 0x00980902 (int)    : min=0 max=4 step=1 default=2 value=2 flags=slider
                       exposure 0x00980911 (int)    : min=0 max=3 step=1 default=0 value=0 flags=inactive
                 gain_automatic 0x00980912 (bool)   : default=1 value=1 flags=update
           power_line_frequency 0x00980918 (menu)   : min=0 max=2 default=0 value=0
				0: Disabled
				1: 50 Hz
				2: 60 Hz
                      sharpness 0x0098091b (int)    : min=-1 max=4 step=1 default=-1 value=-1 flags=slider

I'll restart Skype and see if that makes a difference!

No! Skype can still only see blackness.

Is there anything else I might try?

you can check which device is used by vlc and try to tell skype to use the same.