Backends

youtube-dl-wpf supports both the original youtube-dl and the better-maintained yt-dlp. It tries to automatically detect the backend type when setting the path to backend binary. You can also toggle the backend mode manually.

Differences

Download and embed subtitles: youtube-dl requires both --write-sub and --embed-subs, while yt-dlp only requires --embed-subs. Using --write-sub with yt-dlp results in the downloaded subtitle file being kept after embedding.