Windows ffmpeg updater in PowerShell

updateFFmpeg.ps1

# Updates FFMPEG to the latest version
$ffmpegGH = @{OWNER = 'GyanD'; REPO = 'codexffmpeg' }
$extractTo = Join-Path -Path $env:USERPROFILE -ChildPath 'ffmpeg'
if (-not ([System.Management.Automation.PSTypeName]'SevenZipExtractor.ArchiveFile').Type)
{
    if (-not (Get-Package -Name SevenZipExtractor -ErrorAction Ignore))
    {
        Install-Package SevenZipExtractor -Source nuget.org -Scope CurrentUser
    }
    Get-Package -Name SevenZipExtractor | ForEach-Object { Add-Type -LiteralPath ($_.Source | Split-Path | Get-ChildItem -Filter 'netstandard*' -Recurse -Directory | Get-ChildItem -Filter *.dll -Recurse -File ).FullName }
}
$latestRelease = Invoke-RestMethod -Uri "https://api.github.com/repos/$($ffmpegGH.OWNER)/$($ffmpegGH.REPO)/releases/latest" -Method Get -ContentType 'application/vnd.github+json'
$fullBuildAsset = $latestRelease.assets | Where-Object -FilterScript { $_.name -like '*full_build.7z' }
if ((Test-Path -Path ($ffmpegPath = Join-Path -Path $extractTo -ChildPath 'bin' -AdditionalChildPath 'ffmpeg.exe') -PathType Leaf) -and ($fullBuildAsset.name | Select-String -Pattern 'ffmpeg-([\d\.\w_-]+?)\.7z' | ForEach-Object { $_.Matches.Groups[1].Value }) -eq (&$ffmpegPath -h 2>&1 | Select-Object -First 1 | Select-String -Pattern 'ffmpeg version ([\d\.\w_-]+?)-www\.gyan\.dev Copyright \(c\) \d+-\d+ the FFmpeg developers' | ForEach-Object { $_.Matches.Groups[1].Value }))
{
    'Already installed' | Write-Verbose
    return 1
}
$hashExpected = Invoke-RestMethod -Uri "https://www.gyan.dev/ffmpeg/builds/packages/$($fullBuildAsset.name).sha256"
$downloaded = Invoke-WebRequest -Uri ($fullBuildAsset.browser_download_url) -ContentType 'application/octet-stream'
if ($downloaded.Content -isnot [byte[]])
{
    $encoding = $downloaded.Encoding
    $bytes = $encoding.GetBytes($response.Content)
    $sevenZipStream = [System.IO.MemoryStream]::new($bytes)
}
else
{
    $sevenZipStream = [System.IO.MemoryStream]::new($downloaded.Content)
}
$szExtractor = New-Object -TypeName SevenZipExtractor.ArchiveFile -ArgumentList @($sevenZipStream)
$szExtractor.Entries | Out-Null
$sevenZipStream.Position = 0 # Reset the stream position to the beginning
$hashCalculated = Get-FileHash -Algorithm SHA256 -InputStream $sevenZipStream | Select-Object -ExpandProperty Hash
if ($hashCalculated -eq $hashExpected -and $szExtractor.Entries.Count -gt 0)
{
    foreach ($entry in $szExtractor.Entries[1..($szExtractor.Entries.Count)]) # start at 1 so as to not duplicate root dir
    {
        $filename = $entry.FileName -split [regex]::Escape([System.IO.Path]::DirectorySeparatorChar) | Select-Object -Skip 1 # Skip the first element which is the root dir
        $extractPath = $filename.Count -gt 1 ? ( Join-Path -Path $extractTo -ChildPath $(Join-Path @filename)) : (Join-Path -Path $extractTo -ChildPath $filename)
        $entry.Extract($extractPath)
    }
}
else
{
    'Hash mismatch. Aborting.' | Write-Error
    return 2
}
# Copy entire script
# [System.Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes((Get-Clipboard -Raw))) | Set-Clipboard