I've been using the old youtube-dl with aria2c downloader. That combination works well. youtube-dl.exe -f "bestvideo[height<=2160][vcodec!^=av01]+bestaudio/bes

I've been using the old youtube-dl with aria2c downloader. That combination works well. youtube-dl.exe -f "bestvideo[height<=2160][vcodec!^=av01]+bestaudio/best[height<=2160][vcodec!^=av01]" --all-subs --convert-subs srt --embed-subs --external-downloader aria2c Gets me the best quality that my (fully offline) LG 4K TV can play.