Sure, here is a simple Bash script which uses the stat command to get the modification time of files. It looks specifically for .jpg and .mp4 files in the current directory and prints out the modification date and time, including seconds:

#!/bin/bash

# Iterate over .jpg and .mp4 files in the current directory
for file in *.{jpg,mp4}; do
    # Check if the file exists before trying to extract the date
    if [ -e "$file" ]; then
        # Use stat to extract modification date and print it out
        echo "$file - Modification Date: $(stat -c %y "$file")"
    fi
done

This script will print out the filename along with its modification date for each .jpg and .mp4 file.

You can use this script by saving it in a file (for example, filedate.sh), making it executable with chmod +x filedate.sh, and running it with ./filedate.sh.

Please note that the date format of the stat command can vary based on your system. The %y format outputs the last modification time in human readable format (yyyy-mm-dd hh:mm:ss.sssssssss +zone). You might need to adjust this if you are using a system where stat behaves differently.

Also keep in mind that this script does not traverse directories recursively. It only looks for the specified files in the directory where it is executed. If you need to perform this operation on files in subdirectories, you will need to modify the script slightly or use a different approach.