$prefix="s03e"
$suffix=".mp4"

$titles = @(
"Introduction Learning Goals Objectives",
"Introduction to Entrepreneurship",
"The Entrepreneur",
"Opportunity Organization Resources and Environment in the Entrepreneurship Process",
"The Start-up Process and Business Plan")

$urls_lect = @(
"https://tube.tugraz.at/portal/watch/3000b644-e5d4-4c48-ba3b-f34ef60cc701", #section 0
"https://tube.tugraz.at/portal/watch/81aa3b0e-57fe-4aff-91b2-3eb34e03d064", #section 1
"https://tube.tugraz.at/portal/watch/0793a983-a7f5-4209-a943-336c9e4cea68", #section 2
"https://tube.tugraz.at/portal/watch/238c3479-54a2-42d7-a05c-6fd8d2fc5757", #section 3
"https://tube.tugraz.at/portal/watch/52ecdb57-7713-42cd-b036-fa5a03cd35eb"  #section 4
)

$urls_exec = @(
"", # no exec for section 0
"https://tube.tugraz.at/portal/watch/5e7b4f75-d52d-41a7-b315-82c4515a5838", #section 1
"https://tube.tugraz.at/portal/watch/f82b6152-a226-4026-8249-5a64db9e2bec", #section 2
"https://tube.tugraz.at/portal/watch/a9a91ed8-ddda-4bc1-af98-72d2fd1a8769", #section 3
"https://tube.tugraz.at/portal/watch/02defa69-68e9-4713-8b14-011f4a31195d"  #section 4
)

for( $pos=0 ; $pos -lt $urls_lect.Count ; $pos++)
{
    # Build filename
    $fn_lect = $prefix + "0" + $pos + "-" + $($titles[$pos].tolower().replace(" ","_").replace("-","_")) + $suffix
    $fn_exec = $prefix + "0" + $pos + "-" + $($titles[$pos].tolower().replace(" ","_").replace("-","_")) + "_exercise" + $suffix
    
    yt-dlp -o "~\Downloads\$fn_lect" $($urls_lect[$pos])
    
    yt-dlp -o "~\Downloads\$fn_exec" $($urls_exec[$pos])
}