GIF music! This tool combines a GIF and an MP3 together, or a GIF and a link to a YouTube video. When linking to a YouTube video as audio, this tool also works with YouTube timecodes (i.e. the "#t=" or "&t=" thing at the end of the link, or "copy video URL at current time").
When using a YouTube link as audio, both copy-pasting the YouTube link with the timecode in the link or without (and adjusting the time using this page instead) will work.