I believe she doesn't think that it is DR, she didn't rly mention it and it seems like she just thought of it as anxiety. Mindfulness? No! Is there any online meditation that works? I found a few on YouTube
I don't really follow any youtube videos for meditation, only you really know the best way it works for you. Since I'm a Buddhist I sometimes count the beads on my mala bracelet in my head and that stops any intruding thoughts coming in, but before I got a mala bracelet I used to put soothing music on, there's an app that has like rainforest sounds, and like beach sounds and all of that. I can't remember what the app is called but if you could find it and then put that on and focus on the sounds, that can also clear your mind. If any thoughts come to mind whilst meditating, just let them pass, the brain obviously thought about it for a reason, so just listen to the thought but don't overthink it and then carry on with the meditation.
Let me know if you try any of these methods, or if you need help finding other ways to meditate