Level 24
Free Download Manager

Is it safe?

jdownloader 2
This is an excellent cross-platform downloader for you:
What abouth mp3 from youtube? is there any program ( no web online ) to get them?
youtube-dlg allows you to download a mp3 sound track from a video.

Is this good? MiniTool uTube Downloader | Free Download YouTube Videos


Level 4
I use Youtube-DLG, and it's fast, but for batch downloads I found some files that were not converted. Also, I couldn't choose which files to DL from a playlist or channel. Finally, I get VTT instead of SRT files for subtitles.

JDownloader is slower but converts all files correctly, allows users to select files to DL from playlists and channels, and can DL SRT files. It can also DL from Dailymotion,, and other sites.

For individual downloads, I use Youtube Video and Audio Downloader for Firefox, but I can only DL until 720p. For the two above, I can get 1080p if it's available.