To all who give a shit, I am Schiffy. You want more information? Nah, too bad.

Oldest text image on Youtube:
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The never finished Death Note Altered Sequence
youtube.com/user/mindlessleague

Katawa Shoujo: The Journey
youtube.com/user/katawashoujojourney

Old Youtube prank from 4/1/09 (now outdated)
adding &flip=1 to the end of a video URL turned the video upside down
Other codes (not sure if these works anymore):
-- &fmt=18 : High Quality
-- &fmt=22 : High Definition