The Story of the Diary of River Song (webcast)

 was a short animated webcast narrating the complicated timeline surrounding River Song and the Doctor, released in 2021 on Big Finish Productions' official YouTube channel.

As this was not referred to as a commercial trailer by Big Finish Productions, this story can be considered a valid source.

Publisher's summary
If you are confused by the timeline of River Song in Doctor Who (and spin-off media), this video is unlikely to help.

Plot
to be added

Cast

 * Narrator - Alex Kingston

Continuity

 * Mels Zucker met the Eleventh Doctor, (TV: Let's Kill Hitler) as did yet another, who is labelled "little girl" on screen. (TV: The Impossible Astronaut)
 * Amy named her daughter Melody Pond after her childhood friend Mels, thus naming her after herself. (TV: Let's Kill Hitler)
 * River was present at her parents' wedding. (TV: The Big Bang)
 * During one of her encounters with the Eighth Doctor, he didn't actually see her face. (AUDIO: The Rulers of the Universe)
 * River's meeting with the Fourth Doctor happened in another reality. (AUDIO: Someone I Once Knew)
 * Mels Zucker resembles one of River's clones, Brooke. (AUDIO: My Dinner with Andrew / The Furies)