Heya, Sanghagirl,
I hear how frustrating this is for you and how angry it makes you. I'm glad to hear that talking it through on the video helps. Sometimes you just need to get it out of your system.
I'd be interested to hear more about the anger that you are feeling. What is it directed toward? Watching your video, I could imagine two different things. The first is that you just hate writing. I can actually relate to this because I don't like writing much, either. Sometimes I am in the mood to journal and sometimes I am not. If I'm not in the mood to write and I'm just forcing myself to do writing exercises that I don't want to do, my mind can rebel. If that is the case with you, I don't know if journaling is necessarily your best option. Dr. Sarno uses the metaphor of a reservoir of rage, and forcing yourself to do journaling you really don't want to do could just refill the reservoir. You certainly wouldn't want to do that!
On the other hand, the other thing that I could imagine is that maybe the writing that you are doing is bringing up emotions that are rattling around your unconscious and putting you in a very "triggered" state, where there is simply a great deal of emotional activation going on in your brain. In this case, containment and pacing can be important. This is just the idea of not wanting to bring things up so rapidly that you get overwhelmed. When lots of stuff comes up, that may mean that there is important work to be done, but also that that work should be done slowly.
Do either of these ideas resonate with you? I'd love to hear more of the specifics about what some of these emotions are about.