A simulation to show how many videos someone watches on TikTok in one hour

Tiktok.py

import random
import time

class Values:
    video_types = [15,60,180]
    hour = 3600

def demo():
    input("This is a algorithm to show how many TikTok videos a person can consume (Press enter)")
    print("Videos watches if all videos are 15s that are 100% watched:"+str(Values.hour/15))
    print("Videos watches if all videos are 60s (1m) that are 100% watched:"+str(Values.hour/60))
    print("Videos watches if all videos are 180s (3m) that are 100% watched:"+str(Values.hour/180))
    input("Now press enter to simulate someone (Press enter)")
    time_left = Values.hour
    videos_watched = 0
    while True:
        current_video_time = random.choice(Values.video_types)
        current_video_time = current_video_time - random.randint(0,current_video_time - 1)
        time_left = time_left - current_video_time
        if time_left <= 0:
            print("Ran out of time")
            break
        videos_watched = videos_watched + 1
        print("Watched Video for "+str(current_video_time)+"s and i have "+str(time_left)+"s on Tiktok")
        time.sleep(0.005)
    print("I have watched "+str(videos_watched)+" in one hour")

def test():
    time_left = Values.hour
    videos_watched = 0
    while True:
        current_video_time = random.choice(Values.video_types)
        current_video_time = current_video_time - random.randint(0,current_video_time - 1)
        time_left = time_left - current_video_time
        if time_left <= 0:
            break
        videos_watched = videos_watched + 1
    return videos_watched

def mass_test(tests):
    total_videos_watched = []
    for i in range(tests):
        time_left = Values.hour
        videos_watched = 0
        while True:
            current_video_time = random.choice(Values.video_types)
            current_video_time = current_video_time - random.randint(0,current_video_time - 1)
            time_left = time_left - current_video_time
            if time_left <= 0:
                break
            videos_watched = videos_watched + 1
        total_videos_watched.append(videos_watched)
    a = 0
    for i in total_videos_watched:
        a = a + i
    return round(a/len(total_videos_watched)),total_videos_watched

if __name__ == "__main__":
    demo()