Text Jitter Effect

They may have used Twitch, a Premiere Pro plugin that offers a similar effect. Not entirely sure though

After effects.

The background of the text is a video, video layer, text later, alpha matte the text (drop down besides the layer)

as for the glitch, that's not twitch, or if it is it was redundant. For that i'd just make a few sporadic position keyframes really close together.

Alternatively, you could use a wiggle expression on the position. ALT click the stop watch for position and you get a text box. in that field write wiggle(5,10) (play with the values)

To control the wiggle make an adjustment layer, apply the slider effect to it. then go back to your wiggle expression, highlight one of those values then "pick whip" (the spiral looking thing) and drag it onto the slider control.

Now you can keyframe the slider control to control frequency or amplitude of the wiggle.

you could do that pretty easily with the text movement orientation and velocity in Vegas, im less familiar the FCP