Tutorial to 'convert' MP4 video to a Scratch project: Step 1 - Find a MP4 or YouTube video you would like to upload. Step 1.5 - Convert the Youtube video to MP4. Step 2 - Convert your MP4 to a GIF file. Step 2.5 - Convert your MP4 to MP3. (note: this step can be skipped if you use a YouTube video by also converting it to mp3) Step 3 - Make a new Scratch project and delete the cat. Step 4 - Upload the GIF as a backdrop. Step 4.5 - Upload the MP3 Look at the code and code comments for the rest.