The first 25 seconds of this video have a color test pattern that is original to the BetaSP tape it was digitized from in 2019.
This video contains opening day activities for the Horenberger Field Dedication on April 11, 1999. The footage shows Horenberger interacting with guests that day, the ribbon cutting, throwing out the first pitch and first few plays of the game.
More information is in the April 16, 1999 Argus article available at collections.carli.illinois.edu/cdm/ref/collection/iwu_argus/id/3632