Fixed issue with exiting the program
- Added the option to enter 'quit' to exit the program entirely. The program will terminate immediately when 'quit' is entered.
- Modified the prompt message when asking for user input to include the 'exit' and 'quit' options.
- Added a conditional check to handle the 'exit' command. If the user enters 'exit', the program will continue to the next iteration of the while loop, allowing them to enter a new YouTube video URL or the 'exit' or 'quit' commands.
- Added a conditional check to handle the 'quit' command. If the user enters 'quit', the program will exit immediately using
sys.exit()and display the "Exiting the program." message.