Getting Started Guide updates

[jmbannon]

• Section for tweaking prebuilt presets
• Example and more explanation of preset inheritance

[jimbobcraig]

Improving the documentation would be a great help, for me at least, I'm finding it pretty cryptic...

I have this working for a few subscriptions but REALLY struggling how to download one off videos for later watching & keeping (without the whole channel or playlist)

Been trying to follow your explanation in this issue #683 but have not (yet) got it to work.

Always gives error:

dl arguments must be in the form of --subscription.option.name 'value'

[jmbannon]

dl is indeed not well documented, can you post your command in a separate issue and I can help there.

Alternatively, you can make a public playlist and add your one-off videos there, then point ytdl-sub to download that playlist.