I searched everywhere and couldn't find this posted before. I've been looking for this video for a pretty long time, and finally came across it in a YouTube video, posted above at the moment the speech starts. Apologies if it's a repost....I thought the MGoCommunity should be made aware of its existence. I even found a mailbag denying said existence: http://mgoblog.com/content/mailbag-29
Here's the quoted e-mail:
In regards to you question about Bo’s speech, there is no video only audio. The speech occurred at a full team meeting at the beginning of the 1983 campaign. He would often address us in this manner on Fridays before we got on the bus for the Campus Inn or to the airport. I can tell you that this speech pales in comparison to speeches he gave to us on Saturdays in the locker room just before we hit the field.
Yet here it is.