The KimaraAIWatermarker custom node allows you to apply watermark text and logo overlays to images and videos. Optionally, the watermark can be moved by the move_watermark_step amount of pixels after each generated image.
https://github.com/kimara-ai/ComfyUI-Kimara-AI-Advanced-Watermarks
git clone https://github.com/kimara-ai/ComfyUI-Kimara-AI-Advanced-Watermarks
comfy node install comfyui-kimara-ai-advanced-watermarks