diff --git a/pyrightconfig.stricter.json b/pyrightconfig.stricter.json
index 0f9e8a25856b..1260c173d742 100644
--- a/pyrightconfig.stricter.json
+++ b/pyrightconfig.stricter.json
@@ -59,7 +59,7 @@
         "stubs/jsonschema",
         "stubs/jwcrypto",
         "stubs/ldap3",
-        "stubs/m3u8",
+        "stubs/m3u8/m3u8/model.pyi",
         "stubs/Markdown",
         "stubs/mock/mock/mock.pyi",
         "stubs/mysqlclient",
diff --git a/stubs/m3u8/@tests/stubtest_allowlist.txt b/stubs/m3u8/@tests/stubtest_allowlist.txt
index 28f49d10cb3f..7842199c24e4 100644
--- a/stubs/m3u8/@tests/stubtest_allowlist.txt
+++ b/stubs/m3u8/@tests/stubtest_allowlist.txt
@@ -1,17 +1,5 @@
 # type check only
 m3u8.httpclient.HTTPSHandler.__new__
 # internal functions and attributes
-m3u8.M3U8.simple_attributes
-m3u8.model.M3U8.simple_attributes
-m3u8.model.denormalize_attribute
-m3u8.model.find_key
-m3u8.model.number_to_string
-m3u8.model.quoted
-m3u8.parser.cast_date_time
-m3u8.parser.format_date_time
 m3u8.parser.get_segment_custom_value
-m3u8.parser.normalize_attribute
-m3u8.parser.remove_quotes
-m3u8.parser.remove_quotes_parser
 m3u8.parser.save_segment_custom_value
-m3u8.parser.string_to_lines
diff --git a/stubs/m3u8/m3u8/__init__.pyi b/stubs/m3u8/m3u8/__init__.pyi
index 888edc10743c..8ce37aeb0b52 100644
--- a/stubs/m3u8/m3u8/__init__.pyi
+++ b/stubs/m3u8/m3u8/__init__.pyi
@@ -65,7 +65,7 @@ _CustomTagsParser: TypeAlias = Callable[[str, int, dict[str, Any], dict[str, Any
 def loads(content: str, uri: str | None = None, custom_tags_parser: _CustomTagsParser | None = None) -> M3U8: ...
 def load(
     uri: str,
-    timeout=None,
+    timeout: float | None = None,
     headers: Mapping[str, Any] = {},
     custom_tags_parser: _CustomTagsParser | None = None,
     http_client: _HTTPClientProtocol = ...,
diff --git a/stubs/m3u8/m3u8/model.pyi b/stubs/m3u8/m3u8/model.pyi
index d9b50c11f051..74e3bd2b515f 100644
--- a/stubs/m3u8/m3u8/model.pyi
+++ b/stubs/m3u8/m3u8/model.pyi
@@ -1,7 +1,8 @@
 import datetime as dt
-from _typeshed import Incomplete, StrOrBytesPath
-from collections.abc import Callable, Mapping
-from typing import ClassVar, Literal, Protocol, TypeVar, type_check_only
+from _typeshed import Incomplete, StrOrBytesPath, Unused
+from collections.abc import Callable, Iterable, Mapping
+from decimal import Decimal
+from typing import Any, ClassVar, Literal, Protocol, TypeVar, overload, type_check_only
 from typing_extensions import TypeAlias
 
 from m3u8.mixins import BasePathMixin, GroupedBasePathMixin
@@ -27,7 +28,7 @@ _PlaylistAnyT = TypeVar("_PlaylistAnyT", bound=_PlaylistProtocol)
 class MalformedPlaylistError(Exception): ...
 
 class M3U8:
-    simple_attributes: list[tuple[str, str]]
+    simple_attributes: tuple[tuple[str, str], ...]
     data: dict[str, Incomplete]
     keys: list[Key]
     segment_map: list[InitializationSection]
@@ -118,29 +119,29 @@ class Segment(BasePathMixin):
         uri: str | None = None,
         base_uri: str | None = None,
         program_date_time: dt.datetime | None = None,
-        current_program_date_time=None,
+        current_program_date_time: dt.datetime | None = None,
         duration: float | None = None,
         title: str | None = None,
-        bitrate=None,
-        byterange=None,
+        bitrate: int | None = None,
+        byterange: str | None = None,
         cue_out: bool = False,
         cue_out_start: bool = False,
         cue_out_explicitly_duration: bool = False,
         cue_in: bool = False,
         discontinuity: bool = False,
-        key=None,
-        scte35=None,
+        key: Unused = None,
+        scte35: str | None = None,
         oatcls_scte35: str | None = None,
-        scte35_duration=None,
+        scte35_duration: float | None = None,
         scte35_elapsedtime=None,
         asset_metadata: Mapping[str, str] | None = None,
         keyobject: Key | None = None,
-        parts: list[Mapping[str, Incomplete]] | None = None,
+        parts: Iterable[Mapping[str, Incomplete]] | None = None,
         init_section: Mapping[str, Incomplete] | None = None,
-        dateranges=None,
+        dateranges: Iterable[Mapping[str, Incomplete]] | None = None,
         gap_tag: list[Mapping[str, Incomplete]] | None = None,
         media_sequence: int | None = None,
-        custom_parser_values=None,
+        custom_parser_values: dict[str, Incomplete] | None = None,
     ) -> None: ...
     def add_part(self, part: PartialSegment) -> None: ...
     def dumps(self, last_segment: PartialSegment | None, timespec: str = "milliseconds", infspec: str = "auto") -> str: ...
@@ -177,11 +178,11 @@ class PartialSegment(BasePathMixin):
         uri: str | None,
         duration: float | None,
         program_date_time: dt.datetime | None = None,
-        current_program_date_time=None,
-        byterange=None,
+        current_program_date_time: dt.datetime | None = None,
+        byterange: str | None = None,
         independent=None,
         gap=None,
-        dateranges: list[Mapping[str, Incomplete]] | None = None,
+        dateranges: Iterable[Mapping[str, Incomplete]] | None = None,
         gap_tag=None,
     ) -> None: ...
     def dumps(self, last_segment) -> str: ...
@@ -251,7 +252,25 @@ class StreamInfo:
     pathway_id: str | None
     stable_variant_id: str | None
     req_video_layout: str | None
-    def __init__(self, **kwargs) -> None: ...
+    def __init__(
+        self,
+        *,
+        bandwidth: int | None = None,
+        closed_captions=None,
+        average_bandwidth: int | None = None,
+        program_id: int | None = None,
+        resolution: tuple[int, int] | None = None,
+        codecs: str | None = None,
+        audio: str | None = None,
+        video: str | None = None,
+        subtitles: str | None = None,
+        frame_rate: float | None = None,
+        video_range: str | None = None,
+        hdcp_level: str | None = None,
+        pathway_id: str | None = None,
+        stable_variant_id: str | None = None,
+        req_video_layout: str | None = None,
+    ) -> None: ...
 
 class Media(BasePathMixin):
     base_uri: str | None
@@ -328,7 +347,7 @@ class ServerControl:
         part_hold_back: float | None = None,
         can_skip_dateranges: str | None = None,
     ) -> None: ...
-    def __getitem__(self, item: str): ...
+    def __getitem__(self, item: str) -> str | float | None: ...
     def dumps(self) -> str: ...
 
 class Skip:
@@ -356,7 +375,7 @@ class PreloadHint(BasePathMixin):
         byterange_start: int | None = None,
         byterange_length: int | None = None,
     ) -> None: ...
-    def __getitem__(self, item: str) -> str: ...
+    def __getitem__(self, item: str) -> str | int | None: ...
     def dumps(self) -> str: ...
 
 class SessionData:
@@ -381,7 +400,21 @@ class DateRange:
     scte35_in: str | None
     end_on_next: Incomplete
     x_client_attrs: list[tuple[str, str]]
-    def __init__(self, **kwargs) -> None: ...
+    def __init__(
+        self,
+        *,
+        id: str,
+        start_date: str | None = None,
+        class_: str | None = None,  # actually passing as `class` argument
+        end_date: str | None = None,
+        duration: float | None = None,
+        planned_duration: float | None = None,
+        scte35_cmd: str | None = None,
+        scte35_out: str | None = None,
+        scte35_in: str | None = None,
+        end_on_next=None,
+        **kwargs: str,  # for arguments with `x_` prefix
+    ) -> None: ...
     def dumps(self) -> str: ...
 
 class ContentSteering(BasePathMixin):
@@ -404,3 +437,11 @@ class Tiles(BasePathMixin):  # this is unused in runtime, so this is (temporary)
     duration: Incomplete
     def __init__(self, resolution, layout, duration) -> None: ...
     def dumps(self) -> str: ...
+
+@overload
+def find_key(keydata: None, keylist: Iterable[Key | None]) -> None: ...
+@overload
+def find_key(keydata: Mapping[str, Any], keylist: Iterable[Key | None]) -> Key: ...  # keydata can contain any values
+def denormalize_attribute(attribute: str) -> str: ...
+def quoted(string: str | None) -> str: ...
+def number_to_string(number: str | float | Decimal) -> str: ...
diff --git a/stubs/m3u8/m3u8/parser.pyi b/stubs/m3u8/m3u8/parser.pyi
index f33e0126e8d5..4eaf0543ffc8 100644
--- a/stubs/m3u8/m3u8/parser.pyi
+++ b/stubs/m3u8/m3u8/parser.pyi
@@ -1,14 +1,29 @@
 from collections.abc import Callable
+from datetime import date, datetime, time
+from itertools import repeat
 from re import Pattern
-from typing import Any
+from typing import Any, overload
 from typing_extensions import TypeAlias
 
-ATTRIBUTELISTPATTERN: Pattern[str]
 _CustomTagsParser: TypeAlias = Callable[[str, int, dict[str, Any], dict[str, Any]], object]
 
+ATTRIBUTELISTPATTERN: Pattern[str]
+
+def cast_date_time(value: str) -> datetime: ...
+@overload
+def format_date_time(value: time, *, timespec: str = ...) -> str: ...
+@overload
+def format_date_time(value: datetime, *, sep: str = ..., timespec: str = ...) -> str: ...
+@overload
+def format_date_time(value: date) -> str: ...
+
 class ParseError(Exception):
     lineno: int
     line: str
     def __init__(self, lineno: int, line: str) -> None: ...
 
 def parse(content: str, strict: bool = False, custom_tags_parser: _CustomTagsParser | None = None) -> dict[str, Any]: ...
+def string_to_lines(string: str) -> list[str]: ...
+def remove_quotes_parser(*attrs: repeat[Callable[[str], str]]) -> dict[repeat[Callable[[str], str]], Callable[[str], str]]: ...
+def remove_quotes(string: str) -> str: ...
+def normalize_attribute(attribute: str) -> str: ...