It's only a few frames and is part of another scene unrelated to the launch tube.
This is from Fire in Space when the explosives on the hull of the Galactica detonate blowing a hole in the hull and thus putting out the fire. It also makes it into The Living Legend (part one) where the Raider flies into the landing bay and explodes.
I always doubted this existed but there it is living colour.
* Thanks to Joe Atari at Resin Illuminati for finding this