MESSAGE_SUBJECT = r"anything"
MESSAGE_BODY = r"https://www.youtube.com/"
DISALLOW_KEYWORD = r"anything".lower()
ALLOW_KEYWORD = r"anything".lower()
SUBREDDIT = "anything"
import praw, prawcore, time
reddit = praw.Reddit(
    client_id='x',
    client_secret='x',
    user_agent='MacOSv10:idontknowwhattoputhere.pleasedonthurtme:v1.1.0 (by /u/billy_boi32)',
    username='billy_boi32',
    password=r"x"
)
def retry(f):
    def temp(*args):
        failure=True
        while failure:
            try:
                f(*args)
            except:
                print("error, retrying in 3 seconds")
                time.sleep(3)
            else:
                failure=False
    return temp
while True:
    try:
        for post in reddit.subreddit(SUBREDDIT).stream.submissions(skip_existing=True):
            if ALLOW_KEYWORD in post.title.lower() and DISALLOW_KEYWORD not in post.title.lower():
                retry(post.author.message)(MESSAGE_SUBJECT, MESSAGE_BODY)
    except:
        time.sleep("error, retrying in 10 seconds")