v1.4 Exception-handling and Added "Video" Option

• Added error-handling for all of PyTube's exceptions
• Condensed the code a bit
• Added in an option to download just the video (no audio)
• Working on finding alternatives to PyTube

Full Changelog: v1.2.0...1.4.0

v1.3

• Added error handling to handle an age-restricted video
• Added a switch for all you weirdos that like light_mode
• Minor optimisation and fixes

v1.2

• Added the option to rerun the code so that you don't have to manually rerun it yourself
• Minor optimisations and fixes

v1.1

• Added error handling for when the user puts in an invalid YouTube URL
• Put the code in a class so it's easier to maintain
• Changed the font from Brass Mono to Lucida Sans because Brass Mono isn't a pre-installed font
• Added a feature where the user can choose whether they want the video to be downloaded as either an mp3 or mp4 file