Not sure if this is helpful to anyone but,

If you want to do video that doesn't need audio: Reaction shots, Fashion Glamour, Nature scenes,

I tweaked the Original LTX 2.3 workflow found in ComfyUi

• Removed the audio rendering portion(s) of the workflow.
  (I got tired of prompting "NO AUDIO!" or "NO BACKGROUND MUSIC!" and having LTX not listen.)

• Added an external LORA loader.

• Converted the length to seconds instead of frames

I found that removing this audio flow speeds video generation up quite well.