Enumerate all device groups recursively and build up a hashtable object with the details about the device groups on the system, and all the devices added to those device groups.

DeviceGroupReport.ps1

# Generic function which can take a device group from Get-DeviceGroup and go backwards to determine the full hierarchy of the device group path.
function Resolve-DeviceGroupPath {
    [CmdletBinding()]
    param(
        [Parameter(Mandatory, ValueFromPipeline)]
        [VideoOS.Platform.ConfigurationItems.IConfigurationItem]
        $DeviceGroup
    )

    process {
        $itemType = $DeviceGroup.Path -replace '(\w+)\[.+\]', '$1'
        $item = Get-ConfigurationItem -Path $DeviceGroup.Path
        $path = ""
        while ($true) {
            $path = "/$($item.DisplayName)" + $path
            if ($item.ParentPath -eq "/$($ItemType)Folder") {
                break;
            }
            $item = Get-ConfigurationItem -Path $item.ParentPath.Replace("/$($ItemType)Folder", "")
        }
        Write-Output $path
    }
}

$deviceGroupsByCategory = @{
    Camera = $null
    Microphone = $null
    Speaker = $null
    Metadata = $null
    Input = $null
    Output = $null
}
$VerbosePreference = 'Continue'
foreach ($category in $deviceGroupsByCategory.Keys | Select-Object) {
    $deviceGroupsByCategory.$category = @{ Groups = $null; Contents = $null }
    $deviceGroupsByCategory.$category.Groups = Get-DeviceGroup -DeviceCategory $category -Path / -Recurse | Resolve-DeviceGroupPath | Select-Object -Unique
    $deviceGroupsByCategory.$category.Contents = Get-DeviceGroup -DeviceCategory $category -Path / -Recurse | ForEach-Object {
        $groupPath = $_ | Resolve-DeviceGroupPath
        $_."$($category)Folder"."$($category)s" | Foreach-Object {
            $device = $_
            [pscustomobject]@{
                Group = $groupPath
                Device = $device.Name
                Id = $device.Id
            }
        }
    }
}

# Get the "path" of all camera groups. These represent the group name and the hierarchy and can be used to create new device groups
$deviceGroupsByCategory.Camera.Groups

# Get a report of all the camera groups and the devices inside them and their ID's
$deviceGroupsByCategory.Camera.Contents

# Same as above but for Microphones
$deviceGroupsByCategory.Microphone.Contents