Because my YouTube Subscriber had so many downloads, I decided to do this. This includes:

Account checker (invalid user/pass)
Account counter
Account Subscriber
Friend Adder
Google recovery completer
Load & Save account lists directly from/to a .txt file
Sub4Sub
Username harvester
Video Commenter
Video Liker
Video Disliker
Video Viewer

Pic:
Reqs:
15posts
Future updates:

YT message sender

Log:
V4.2 Final - 19th February 2012 - Fixed the bot, hopefully this works as it should
V4.01 - 24th January 2012 - Fixed the pop up problem
V4 BETA - 23th January 2012 - Removed all limits etc.
V3.9 - 22nd January 2012 - Fixed commenting, subscribing and account checking. Removed video flag and account creator
V3.8 - 3rd December 2011 - Fixed the bot because YouTube layout changed, bugs may occur
V3.7 - 9th November 2011 - Fixed few semi-critical errors
V3.6 - 16th September 2011 - Fixed login because YouTube login page changed
V3.5 - 27th August 2011 - Bugfixes, new upgrade to make the bot better for TBN subscribers etc.
V3.01 - 24th June 2011 - Small fixes and added automatic thankyou list
V3 - 22th June 2011 - Added Account creating helper and account counter
V2.81 - 17th June 2011 - Reup v2
V2.8 - 16th June 2011 - Reup
V2.7 - 11th June 2011 - Added video viewer
V2.61 - 10th June 2011 - Fixed broken auth (again )
V2.6 - 8th June 2011 - Fixed broken auth
V2.4 - 5th June 2011 - Fixed commenter, added new auth
V2.3 - 2th June 2011 - Fixed friend adder, added username harvester etc.
V2.2 - 31th May 2011 - Added Video Flag feature
V2.1 - 28th May 2011 - Fixed auth error (accidently set too high reqs) and couple other bugfixes.
V2.0 [Beta] - 27th May 2011 - Re-coded the whole bot. Added MANY new features.
V1.7 - 27th May 2011 - Fixed error (bot would only complete task once).
V1.6 - 24th May 2011 - Fixed errors
V1.5 - 24th May 2011 - YouTube Friend Adder -feature added.
V1.3 - 20th May 2011 - Fixed few bugs including the webbrowser error bug.
V1.2 - 16th May 2011 - Fixed few bugs, added Dislike feature, account checking, made commenting better and made the bot faster!
V1 - 15th May 2011 - Bot released with following features: Comment, Like, Subscribe
If you find any errors/bugs, please report them here and I'll fix them in the future versions
Thanks for Coden and HydroThunder for providing me YT accounts for testing .
Old versions:
YoutubeAIO V1 by Jani.exe (76 KB, 36 views)
YouTubeAIO V1.22 by Jani.exe (202.5KB, 73 views)
YoutubeAIO V1.3 by Jani.exe (205.0 KB, 47 views)
YoutubeAIO V1.6 by Jani.exe (205.0 KB, 53 views)
YouTube AIO V2.1 by Jani.exe (235.0 KB, 67 views)
YouTube AIO V2.2 by Jani.exe (236.0 KB, 45 views)
YouTube AIO V2.3 By Jani.exe (252.5 KB, 75 views)
YouTube AIO V2.5 by Jani.exe (249.0 KB, 94 views)
YouTube AIO V2.6 by Jani.exe (249.0 KB, 51 views)
YouTube AIO V2.61 by Jani.exe (249.5 KB, 30 views)
YouTube AIO V2.7 by Jani.exe (315.0 KB, 124 views)
YouTube AIO V2.8 by Jani.exe (295.0 KB, 31 views)
YouTube AIO V2.85 by Jani.exe (259.0 KB, 116 views)
YouTube AIO V3 BETA by Jani.exe (257.0 KB, 85 views)
YouTube AIO V3.01 BETA by Jani.exe (257.0 KB, 1598 views)
YouTube AIO V3.5 by Jani.exe (262.0 KB, 530 views)
YouTube AIO V3.6 by Jani.exe (262.0 KB, 930 views)
YouTube AIO V3.7 by Jani.exe (262.0 KB, 563 views)
YouTube AIO V3.8 by Jani.exe (262.0 KB, 1064 views)
YouTube AIO V3.9 by Jani.exe (257.5 KB, 28 views)
YouTube AIO V4 by Jani.exe (261.0 KB, 23 views)
YouTube AIO V4.01 by Jani.exe (261.0 KB, 688 views)
Total: 6323

Download Here
Bot fix'd