What are some alternatives?
When comparing HearSeeParty and MVGEN, you can also consider the following products
Glitchatron - Destroy your favorite photos
Photomosh - Turn anything into a vaporwave
Tumblr Music Video Generator - turn Tumblr accounts into music videos
Decim8 - Turn photographs into glitch art
Glitch Wizard - Create trippy glitch photos and animated GIFs
Gif Sound - Combine Gifs and audio