i think you may like incorporating this code

[Shio1999]

Expected behavior of the wanted feature

i think you may like incorporating this code from modernH
Smart title display — automatically parses and cleans filenames for the title bar, Playlist and Audio track labels:
TV series → Show Name • S01E03 • Episode Title
Movies → Movie Title (2023)
Strips release junk: 1080p, BluRay, x265, WEB-DL, REMUX, etc.
https://github.com/HarkeshBhatia/ModernH

i just did it with some AI help

[Shio1999]

Step 1: Add the cleanup function
Open your modernz.lua file and search for local function osc_init().

Right above that line, paste your cleanup function:

Lua
local function clean_media_title(raw)
if not raw or raw == "" then return "" end

-- clean filename
raw = raw
    :gsub('%.', ' ')
    :gsub('_', ' ')
    :gsub('%b[]', '')

-- detect series + episode title
local show, season, episode, epname =
raw:match("^(.-)[%s%.%-_]*[Ss](%d+)[Ee](%d+)[%s%.%-_]*(.-)$")

if show and season and episode then
    show = show:gsub("%s+$", "")
    epname = epname or ""

    -- remove junk after episode name
    epname = epname
        :gsub('1080p.*', '')
        :gsub('720p.*', '')
        :gsub('BluRay.*', '')
        :gsub('WEB%-DL.*', '')
        :gsub('WEBRip.*', '')
        :gsub('HDRip.*', '')
        :gsub('x264.*', '')
        :gsub('x265.*', '')
        :gsub('%s+$', '')
        :gsub('%s%-%s.*', '')
        :gsub('[%s%(%-]+$', '')

    if epname ~= "" then
        return string.format("%s • S%02dE%02d • %s", show, tonumber(season), tonumber(episode), epname)
    else
        return string.format("%s • S%02dE%02d", show, tonumber(season), tonumber(episode))
    end
end

-- detect movie + year
local title, year = raw:match("^(.-)%s+(%d%d%d%d)%s")

if title and year then
    title = title:gsub("%s+$", "")
    return string.format("%s (%s)", title, year)
end

-- final cleanup fallback
raw = raw
    :gsub('1080p.*', '')
    :gsub('720p.*', '')
    :gsub('BluRay.*', '')
    :gsub('WEB%-DL.*', '')
    :gsub('WEBRip.*', '')
    :gsub('HDRip.*', '')
    :gsub('x264.*', '')
    :gsub('x265.*', '')
    :gsub('DTS.*', '')
    :gsub('%-.*', '')
    :gsub('%s+$', '')

return raw

end
Step 2: Inject the logic into the title pipeline
Inside the osc_init function, scroll down just a few lines until you find this specific block (around the make_escaped_title definition):

Lua
local function make_escaped_title(source)
local title = mp.command_native({"expand-text", source})
title = title:gsub("\n", " ")
return title ~= "" and mp.command_native({"escape-ass", title}) or "mpv"
end
Replace that entire block with this updated version:

Lua
local function make_escaped_title(source)
local title = mp.command_native({"expand-text", source})
title = title:gsub("\n", " ")

    -- Apply your custom filename cleanup here
    title = clean_media_title(title)
    
    return title ~= "" and mp.command_native({"escape-ass", title}) or "mpv"
end