[Feature request] Addition to playlist metadata

[JVS-XII]

Checklist (Your issue will be automatically closed if you delete this part)

• [x] I make sure that there are no existing issues - open or closed - which I could contribute my information to.

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** Description

• last update date of viewing playlist (present in youtube web-version)

[JVS-XII]

I think it's also appropriate to mention here:

• Description of playlist

desirable and necessary from the point of view of complete functionality:

• selectable text and clickable links