About:
A Reddit bot that detects certain types of Youtube reposts in a given subreddit.

Reddit has a rudimentary method of detecting duplicate submissions. It takes the submission URL, then strips the leading "www" and any anchor ("index.html#anchor") at the end. For some web content, this system works well. However, there is more than one URL that can reach a Youtube video. The following links will show the same video:

http://www.youtube.com/watch?v=uRGljemfwUE (basic link)
http://youtu.be/uRGljemfwUE (shortened link)
http://www.youtube.com/watch?v=uRGljemfwUE&feature=youtu.be (what the shortened link redirects to)
http://www.youtube.com/watch?v=uRGljemfwUE&list=FLrzKKs_p0amTiGyFvNYxIrw&index=54&feature=plpp_video (a link from a playlist)
http://www.youtube.com/watch?v=uRGljemfwUE&foo=bar&bar=foo&abc=123 (any extra key/value pairs) 

yt_repost will detect youtube submissions of any form, and look for duplicates of the first three forms. It then posts a comment listing the duplicates.

Usage: python yt_repost.py subreddit [last_ID]
	create a username/password file at ~/username.txt. It should have two lines: the first being the screenname, the second being the password

Requirements:
	Python requests: http://pypi.python.org/pypi/requests

ideas for improvements: 
	use reddit api wrapper: https://github.com/mellort/reddit_api
	a more secure way of storing username+password
	use http://www.reddit.com/domain/youtube.com/new/ and http://www.reddit.com/domain/youtu.be/new/
		This is more comprehensive, but not all moderators may want the bot on their subreddit. Also, subreddits that the bot is not a moderator of may rate-limit the bot's comments until it gets more upvotes.
	show timestamps of duplicate posts
	keep statistics on the frequency of different kinds of youtube URLs 
	
compatible with python 2.6.6