see_last.py

import datetime

fake_durations = []  # list of durations in seconds

for x in range(0, 1000):
    fake_durations.append(1000)


# it is = 1 milion
# 1 milion seconds is more than 11 days.
def plylst():
    duration = []
    dict1 = {}
    total_in_seconds = 0
    for d in fake_durations:

        # to simulate duration.append(video.length)
        duration.append(d)
        # durations now contain 1000 elemnt , each of them = 1000
    # NB:. I changes the indentation here
    total_in_seconds = sum(duration)
    print(total_in_seconds)  # it equals 1 milion , So it is correct till here
    # str(datetime.timedelta(seconds=sum(duration)))
    your_value = datetime.timedelta(seconds=sum(duration))
    print(your_value)  #  correct also

    with open("سلاسل السرد.txt", "a", encoding="utf-8") as f:
        for key, value in dict1.items():
            print(f"{key}: {value}", file=f)
        print(your_value, file=f)  # correct also


plylst()