How to access files on s3 from lambda using filepath and not url

I know this may be a weird question to ask, but i'd ask it anyway. I have a lambda function that's meant to convert some video files in a folder in an s3 bucket to audio files. My method of conversion (Moviepy library with python) requires me to provide the path to the files to be converted and a path to where the converted should be saved. So far i know s3 gives me s3://mybucket/Videos/12345.mp4 but this won't work with the library i am converting with. So i want to know if it possible for me to mount my s3 so i can access files directly like mnt/mybucket/videos/12345.mp4

**Disclaimer: ** i know i can use an EFS but these files are already saved on s3. I also know i can download these files to my lambda runtime environment and access them like i would have done offline, but i want to know if there is a way i can do this like i have described.