YouTube only accepts video files, so an MP3 has to become a video before you can upload it. Combine the song with a cover image in a free MP3 to MP4 converter, download the video, and upload it in YouTube Studio. To get your songs into YouTube Music's catalog as an artist, release through a distributor instead.
Want more than a still image? Try the AI music video generator.
Not directly. YouTube only accepts video files, so combine the MP3 with an image to make an MP4 (or WebM) first, then upload that video.
Open an MP3 to MP4 converter, add the song and a cover image, create the video, and download it. Solmi's converter does this free in the browser without uploading your files.
Artists release through a distributor, which delivers the songs to YouTube Music. For personal listening, you can upload your own files to your YouTube Music library at music.youtube.com; those uploads are private.
1920 x 1080 or 1280 x 720 fills the player. A square cover also works, with bars on each side.
Only if the audio matches music registered in Content ID. Your own original music is fine; if your distributor runs Content ID for you, allowlist your own channel.