Download di un video da Rai Play in Powershell

# sgart-download-video.ps1
# Sgart.it
# download stream video in un file
# FileIndex: url con l'elenco stream video
# VideoName: nome del file video da salvare

param(
    [Parameter(Mandatory=$true)][string]$FileIndex,
    [Parameter(Mandatory=$true)][string]$VideoName
)

# process index
$contentIndex = Invoke-WebRequest -Uri $FileIndex
$lines = $contentIndex.ToString() -split "`n"

$files= @()
$lines | foreach{
    if($_ -like "https://*"){
        $files += $_
    }
}
$i=0
$m=$files.count

$dtStart = Get-Date

Write-Host "File da scaricare: $m" -ForegroundColor Green

# creo il file vuoto
New-Item $VideoName -Force

$files | foreach {
    $i++
    Write-Host "$i/$m" -ForegroundColor Green
    Write-Host "  $_" -ForegroundColor Gray
    $content = Invoke-WebRequest $_

    $OutFile = [System.IO.File]::Open($VideoName, [System.IO.FileMode]::Append)
    
    $InFile =$content.RawContentStream
    $InFile.CopyTo($OutFile)
    $InFile.Dispose()
    
    $OutFile.dispose()
}
$delta = (Get-Date) - $dtStart
Write-Host "Tempo totale di download: $delta" -ForegroundColor Yellow

.\sgart-download-video.ps1 "https://2uscreativem3-vh.akamaihd.net/i/Italy/podcastcdn/Rai/rai4/Rai4_serie_GEOPROTETTO/10418036_,800,1800,.mp4.csmil/index_1_av.m3u8?null=0" "video-s02-e03.mp4"