Simple YouTube timestamp converter for Python (simple thing I needed for a project) | Right now it only supports 4 digit numbers: (mm:ss)

YouTube_TimeStamp.py

class TimestampConverter:
    def __init__(self, time_):
        self.time_ = time_
        self.len_dig = len(self.time_)
        self.time_array = []
        if self.len_dig == 4:
            self.time_array.append(self.time_[:2])
            self.time_array.append(self.time_[2:])
            first = int(self.time_array[0]) * 60
            second = int(self.time_array[1])
            first_math = first + second
            print(f"Number of digits: [{self.len_dig}] "
            f"Seconds in minutes: [{int(self.time_array[0]) * 60}] "
            f"and in seconds [{int(self.time_array[1])}] "
            f"With the final results being [{first_math}]")