DirectVobSub / XySubFilter

1) Here it say that the version of DirectVobSub / XySubFilter is 8.2.0 when it is really 3.2.0.
2) There is a new version with WebVTT support (3.2.0.806).
2) Are the ones included in the codec pack the same of https://github.com/pinterf/xy-VSFilter or they contains additional changes?

They are not updated yet.

Use internal subtitle renderer.

I know but I do tests on many players and if there is, for example, a bug in LAVFilters regarding subtitle loading on Window Media Player I would like to report it as early as possible.
Version "8.2.0" never existed (that I know), so I think it is a typo.

What also I would like to know is if the version currently included in the codec pack is compiled as is from original sources or it is modded like LAVFilters

Any subtitle issue you have with WMP is very unlikely the fault of LAV Filters.

WMP only loads DirectVobSub if the preferred decoder is set to "use merit" with Codec Tweak Tool. Without that trick/hack it won't work properly.

Testing WMP is a complete waste of your time. That player is total crap.