Preserve slashes in video title

[jxu]

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Using 2018.01.14 but I don't think this is version specific.

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Description of your issue, suggested solution and other information

If a video is titled "5/12", then using %(title)s produces "5_12". Is there any way to preserve special characters in the filename? I would be okay with something like "5%2F12".

Alternatively if there's a fast way to download only video names from a playlist (-e or -j seems do to one video at a time) I will accept that as well.

[dstftw]

Not possible. / can't be used in filenames. --get-title.

[jxu]

--get-title does one video at a time for playlists, like -e or -j. Can all the names of playlist videos be downloaded at once? In fact when using --download-archive the names are all printed, albeit with extra text.

[dstftw]

--download-archive has nothing to do with titles. --flat-playlist may extract titles for some extractors.