I would counter that there are many good use cases that go beyond the scope of what was mentioned in the video (his concerns are absolutely legitimate).

For example:
Nvidia's DLSS for gamers. This provides a decent boost to FPS while maintaining a good quality picture. They use multiple models such as motion prediction, interpreting between the frames what the image should look like, and upscaling. These models are (most likely) trained on the video games themselves which is why you want to get the latest driver updates because they include updates to those models. And, yes, the upscaling and interpolation models here are generative models as they are filling in frames with new pictures with details that aren't there from the source, and then enlarging the picture and filling in details in a way that traditional means of upscaling cannot.

Brainstorming/writer's block:
For generative text models, I think these have to be used carefully, and treated as if they're interns that have a knowledge in a very broad range of subjects. They're great for brainstorming ideas and for writer's block, but their output needs to be verified for accuracy and the output shouldn't be trusted or used directly in most cases.

Entertainment:
They're also excellent for entertainment purposes, for example, check out this GLaDOS project:
https://old.reddit.com/r/LocalLLaMA/comments/1csnexs/local_glados_now_running_on_windows_11_rtx_2060/
Which is combining a generative text (LLM) model with a generative audio (text to speech) model as well as a few other models.

Green screen tools:
We could use the sodium vapor process to create training material for a model that can quickly and accurately handle processing green screens for video production:
https://www.youtube.com/watch?v=UQuIVsNzqDk

Creating avatars for user accounts on websites.

Creating interesting QR codes that actually work:

https://civitai.com/models/111006/qr-code-monster

So, in the end, I think that there are some incredible uses for generative AI that go beyond just "creating garbage fast", that don't cause problems in the way that this video is describing (and those problems he describes are definitely valid).