How to use the ytcc.database.Database function in ytcc

def init_db():
    insert_list = [
        Video(yt_videoid="0", title="title1", description="description1", publisher="id_publisher1", publish_date=1488286166,
              watched=False),
        Video(yt_videoid="0", title="title1", description="description1", publisher="id_publisher1", publish_date=1488286167,
              watched=False),
        Video(yt_videoid="1", title="title2", description="description1", publisher="id_publisher1", publish_date=1488286168,
              watched=False),
        Video(yt_videoid="1", title="title2", description="description2", publisher="id_publisher2", publish_date=1488286170,
              watched=False),
        Video(yt_videoid="2", title="title3", description="description3", publisher="id_publisher2", publish_date=1488286171,
              watched=False)
    ]
    db = Database(":memory:")
    db.add_channel(Channel(displayname="publisher1", yt_channelid="id_publisher1"))
    db.add_channel(Channel(displayname="publisher2", yt_channelid="id_publisher2"))
    db.add_channel(Channel(displayname="publisher3", yt_channelid="id_publisher3"))
    db.add_videos(insert_list)
    return db

def test_add_and_get_channels(self):
        db = Database(":memory:")
        db.add_channel(Channel(displayname="Webdriver Torso", yt_channelid="UCsLiV4WJfkTEHH0b9PmRklw"))
        db.add_channel(Channel(displayname="Webdriver YPP", yt_channelid="UCxexYYtOetqikZqriLuTS-g"))
        channels = db.get_channels()
        self.assertEqual(len(channels), 2)
        self.assertEqual(channels[0].displayname, "Webdriver Torso")
        self.assertEqual(channels[0].yt_channelid, "UCsLiV4WJfkTEHH0b9PmRklw")
        self.assertEqual(channels[1].displayname, "Webdriver YPP")
        self.assertEqual(channels[1].yt_channelid, "UCxexYYtOetqikZqriLuTS-g")

def test_add_channel_duplicate(self):
        db = Database(":memory:")
        db.add_channel(Channel(displayname="Webdriver Torso", yt_channelid="UCsLiV4WJfkTEHH0b9PmRklw"))
        db.add_channel(Channel(displayname="Webdriver Torso2", yt_channelid="UCsLiV4WJfkTEHH0b9PmRklw"))

def __init__(self, override_cfg_file: Optional[str] = None) -> None:
        self.config = Config(override_cfg_file)
        self.database = Database(self.config.db_path)
        self.video_id_filter: List[int] = []
        self.channel_filter: List[str] = []
        self.date_begin_filter = 0.0
        self.date_end_filter = (0.0, False)
        self.include_watched_filter = False

def _maybe_update(self) -> None:
        db_version = int(self._execute_query_with_result("PRAGMA USER_VERSION;")[0][0])
        if db_version < Database.VERSION:
            updater.update(db_version, Database.VERSION, self.dbconn)