I never used this theme component on my community websites as it was of no use.
But I also have my own personal, closed forum which I use for many purposes.
I’ve found placeholder forms incredibly useful for me. In particular, I use lengthy commands multiple times a week that I don’t remember and need to modify parts of each time.
The component allows me to quickly customize and copy-paste those commands in my terminal for immediate results.
Three examples of what I use it for :
Convert all pictures from a given format to JPG
Get-ChildItem -Filter *.=EXTENSION= | ForEach-Object { magick $_.FullName -quality =QUALITY= ($_.FullName -replace '\.=EXTENSION=$', '.jpg'); if (=DELETE_ORIGINAL= -eq 1) { Remove-Item $_.FullName } }
Add a delay on all .srt subtitles files from the current folder[1]
Get-ChildItem -Filter '*.srt' | ForEach-Object {
$srtFile = $_.FullName
$tempSrtFile = "$($srtFile).tmp.srt"
Write-Host "Processing: $srtFile" -ForegroundColor Green
ffmpeg -itsoffset =DELAY= -i "$srtFile" -c copy "$tempSrtFile"
if (Test-Path -LiteralPath "$tempSrtFile") {
Move-Item -LiteralPath "$tempSrtFile" -Destination "$srtFile" -Force
Write-Host "Shifted $srtFile by =DELAY= second(s)." -ForegroundColor Green
} else {
Write-Host "Failed to process $srtFile. Check FFmpeg output." -ForegroundColor Red
}
}
Clip and convert a given video file to H264, HEVC or lossless format
if ("=CODEC=" -eq "h264") { ffmpeg -ss =FROM= -to =TO= -i "=FILENAME=" -c:v libx264 -pix_fmt yuv420p -crf =COMPRESSION= -preset medium -c:a aac -b:a 192k -movflags +faststart "=FILENAME=-h264.mp4" } elseif ("=CODEC=" -eq "hevc") { ffmpeg -ss =FROM= -to =TO= -i "=FILENAME=" -c:v libx265 -pix_fmt yuv420p -tag:v hvc1 -crf =COMPRESSION= -preset medium -c:a aac -b:a 192k -movflags +faststart "=FILENAME=-hevc.mp4" } elseif ("=CODEC=" -eq "lossless") { ffmpeg -ss =FROM= -to =TO= -i "=FILENAME=" -c:v ffv1 -level 3 -g 1 -c:a pcm_s16le "=FILENAME=-=CODEC=.mkv" } else { Write-Host "Unknown codec: =CODEC="; exit 1 }
So far, it has been a very important feature for my personal Discourse – and thus for my everyday life – so I’m very happy it exists. 
The only downside is that I’d like the component to have a button shortcut because… I don’t remember the whole syntax to create the placefolder fields in a new topic and rely on copy-paste 
Oh well, writing this topic made me have a look at the toolbar options and realize there is, indeed, a shortcut, which makes me feel both silly and happy 
Another great thing about this component, then.
This one is just a matter of replacing a single duration in the script, but it’s still easier for me to tweak it this way than changing the value directly in the code
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