Where the music hides
Short videos are built on songs, but they rarely tell you which one – the credit says "original audio", the caption is a joke, and the clip lasts eleven seconds. The song finder listens to the video's soundtrack and works it out, the same way it would with a recording of a song.
What it does with the video
It does not need the picture, only the sound. On the web, your browser opens the video and pulls out its audio track before anything is uploaded, so a 40 MB video costs a fraction of that to send. In Telegram, the bot extracts the sound on its side.
The soundtrack is then cut into overlapping windows across its length and each window is checked, with silent stretches skipped. A song is announced only when two windows independently agree. That rule is what stops a clip with a lot of talking from being confidently labelled as the wrong song. When the windows disagree, you get the candidates as buttons and choose.
From a YouTube link, without downloading it
For YouTube there is a shortcut in the bot. Send the link and press Identify the music (Shazam) in the video's menu. The bot fetches only a piece of the soundtrack – about a minute and a half from the start – and if nothing is found there, a second piece further in, where songs in vlogs and compilations often start. You never download the video itself.
After it is found
In Telegram, the recognised song is downloaded for you: the studio recording, matched against the catalogue, tagged with its title, artist, album and cover, with a Lyrics button underneath. On the web, the answer comes with buttons to download it, read the lyrics or open it in the bot.
Also useful
- Keep just the song part of the video with the cutter.
- Take the video's own sound with reel to MP3 or YouTube to MP3.