YoutubePlayer is a free,no virus Youtube Client program.
Using it you can play and downloaded Youtube video. You can use YoutubePlayer Manage your Youtube playlists, favorites,recommend, new subscription videos. sync local playlist to your Youtube playlist.
YoutubePlayer support Youtube CC(Translation CC) and SRT subtitles,You can set up automatic loading CC(Translation CC) or SRT subtitles,You can also download the Youtube CC(Translation CC) as SRT File.