remove special characters from title when saving file

[400thecat]

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Question

I have an alias, something like this:

youtube-dl --no-check-certificate -o "/mnt/media/download/$(date +%Y-%m-%d)__%(title)s-%(id)s.%(ext)s"

it works well, but the title usually contains unsafe characters, spaces, non-asci, and so on.

Is there a way to define some kind substitution, such as spaces are automatically converted into underscores and special characters removed ?

[dstftw]

--restrict-filenames             Restrict filenames to only ASCII
                                 characters, and avoid "&" and spaces in
                                 filenames