I'm brand new to vMix, so I'm sure this is a very simple process, but I'm still working my way up the learning curve. I'm trying to apply a text overlay (Text HD, in my case) input on top of a video for perhaps a minute every half hour. So every half hour, the overlay would apply for a minute, then turn itself off until another half hour has passed. I've tried a couple of things including Triggers and the general overlay settings, but I haven't quite found a suitable procedure for what I want and I'm willing to take any help I can get.

Many thanks.