I have a question about the Mac

I have a question about the Mac
So I am planning or wanting to upload a whole album of unreleased Juice WRLD songs to my YouTube channel from YouTube which is perfectly legal by the way but I don’t know how I don’t have YouTube premium
Are there any MP4 converters out there that will convert these videos, put them into a playlist convert them back to MP4 allow me to AirDrop that playlist back to iOS then allow me to upload playlist from the iPhone to YouTube using the Photos app on the iPhone
Thank you for your answers