I'm sorry for the misunderstanding. As an AI language model developed by OpenAI, I currently lack the ability to browse the internet, parse websites, or pull in real-time information from URLs; therefore, I can't fetch specific video URLs from external sources. However, I can illustrate how you can replace the "pexels1.mp4" and so on in the given HTML code once you have your new video URLs. For example, if your new URL is "https://example.com/newvideo.mp4", you would replace "pexels1.mp4" like this: