Hi! From one relative newcomer to another, welcome to the place. You will get lots of help and friendly analysis here
I'm not familiar with the tube depot kit, but it looks nice!
What tubes are you using in V1 and V2? Different mu tubes will produce more or less gain.
I watched the video. On the cheap laptop speakers I have here, I thought I heard a click or sputter, but could see nothing. If the amp is doing something strange, then double-check the wiring, look for bad solder connections, take voltage readings, maybe swap tubes to see if the problem follows the tube; be specific with your conditions, including things like whether there's anything plugged into the input.