I motified the motion workflow to make it work with GGUF and added in keeping original audio. It does a good job of keeping both original audio and motion while changing the style. You could even use this to inpaint objects into the original video.

Models:
LTX23_audio_vae_bf16.safetensors
gemma_3_12B_it_fp4_mixed.safetensors
ltx-2.3_text_projection_bf16.safetensors
ltx-2.3-22b-distilled-Q5_K_M.gguf
ltx-2.3-22b-distilled-lora-384.safetensors
LTX23_video_vae_bf16.safetensors
ltx-2.3-22b-ic-lora-union-control-ref0.5.safetensors

Restyling Notes:
Text to Style seems to often just make asian realistic styles
I added flux 9b to take the first frame and restyle it for better results.
You can upload you own starting image which will apply the motion to that image.