https://www.youtube.com/watch?v=naVoMFKMXfo
Download: https://drive.google.com/file/d/1sTEdebNB6FNvZwzbBt_iF7ZO3iKLiGtL/view?usp=sharing
Sources:
The flac can be downloaded from https://pony.fm/tracks/553-for-a-united-equestria-feat-eilemonty
The instru flac can be downloaded from https://pony.fm/tracks/570-for-a-united-equestria-instrumental
but they can also be bought on bandcamp, so I reencoded the flac files to ogg
background and cover artwork comes from https://www.deviantart.com/emkay-mlp/art/United-Equestria-Wallpapers-296678198