The workflows are based on the extracted models from
https://huggingface.co/Kijai/LTXV2_comfy
The extracted models runs easier on the computer (as separate files), as well as GGUF support etc
(but you can easily swap out the model loader for the ComfyUI default model loader if you want to load the checkpoint with "all in one" vae built-in etc)
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https://github.com/kijai/ComfyUI-KJNodes (NB! Must be up to date for LTX-2 support)
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https://github.com/city96/ComfyUI-GGUF (NB! Must be up to date for LTX-2 support)
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ComfyUI itself must be updated to very latest