This is a MPV (https://mpv.io/) script and should be placed into the scripts folder of its config folder. The script skips sponsor segments. It is meant to be used with downloaded Youtube videos via yt-dlp that have chapters marked with sponskrub.

sponsor-skip.lua

--[[
    This is a MPV (https://mpv.io/) script and should be placed into the scripts folder of its config folder.

    The script skips sponsor segments.
    It is meant to be used with downloaded Youtube videos via yt-dlp that have chapters marked with sponskrub:
    https://github.com/yt-dlp/yt-dlp#sponskrub-sponsorblock-options
    It also works with mpv_sponsorblock.

    The actions for each type of segment can be configured below or in script-opts/sponsor-skip.conf.
    All six segment types can be tested with these videos:
    https://www.youtube.com/watch?v=K07sEM6y4Uc
    https://www.youtube.com/watch?v=BgfcToAjfdc
    https://www.youtube.com/watch?v=Joed0P3hhbc

    If you are using the uosc script (https://github.com/darsain/uosc),
    you can color the segments in the timeline using the uosc.conf file like this:
    chapter_ranges=sponskrub%-sponsor<007800:0.5>.*,Sponsor segment start<007800:0.5>Sponsor segment end,sponskrub%-intro<808000:0.5>.*,Intro segment start<808000:0.5>Intro segment end,sponskrub%-outro<700000:0.5>.*,Outro segment start<700000:0.5>Outro segment end,sponskrub%-interaction<87006c:0.5>.*,Interaction segment start<87006c:0.5>Interaction segment end,sponskrub%-selfpromo<35bfbf:0.5>.*,Selfpromo segment start<35bfbf:0.5>Selfpromo segment end,sponskrub%-music%_offtopic<4a63a6:0.5>.*

    TODO: skip-on-keypress action
--]]

require 'mp.options'

-- ACTIONS CONFIG --
-- skip: skips to the next chapter on playback
-- print: prints temporarily the segment type on the on-screen-display
local options = {
    actions = {
        sponsor = "skip",
        intermission = "none", --  intro
        endcards = "none",  -- outro
        interaction_reminder = "print",
        unpaid_promotion = "print",
        non_music = "none",
    },
    patterns = {
        -- uses lua patterns; % is an escape symbol
        sponsor = {
            "sponskrub%-sponsor",
            -- The keyword below is commented out because mpv_sponsorblock already skips sponsor segments by default
            -- "Sponsor segment start",
        },
        intermission = {
            "sponskrub%-intro",
            "Intro segment start",
        },
        endcards = {
            "sponskrub%-outro",
            "Outro segment start",
        },
        interaction_reminder = {
            "sponskrub%-interaction",
            "Interaction segment start",
        },
        unpaid_promotion = {
            "sponskrub%-selfpromo",
            "Selfpromo segment start",
        },
        non_music = {
            "sponskrub%-music%_offtopic",
        },
    },
    pretty_names = {
        sponsor = "Sponsor",
        intermission = "Intermission",
        endcards = "Endcards",
        interaction_reminder = "Interaction Reminder",
        unpaid_promotion = "Unpaid Promotion",
        non_music = "Non-Music",
    },
    print_duration = 2,
}

read_options(options)

function check_chapter(_, chapter)
    if not chapter then
        return
    end
    for segment_type, action in pairs(options.actions) do
        if (action == "skip" or action == "print") then
            for _, p in pairs(options.patterns[segment_type]) do
                if string.match(chapter, p) then
                    if action == "skip" then
                        mp.osd_message("Skipped " .. options.pretty_names[segment_type], options.print_duration)
                        mp.command("no-osd add chapter 1")
                    else
                        mp.osd_message(options.pretty_names[segment_type], options.print_duration)
                    end
                    return
                end
            end
        end
    end
end

mp.observe_property("chapter-metadata/by-key/title", "string", check_chapter)