Videos
ABRSM’s teaching notes videos on pieces in the current exam syllabus: https://gb.abrsm.org/en/teacher-support/videos/teaching-notes-live
ABRSM’s ‘Tips from the chief examiner’ videos: https://gb.abrsm.org/en/teacher-support/videos/tips-from-the-chief-examiner
Software
MuseScore is free, but fully featured, notation software for Windows, Mac or Linux: https://musescore.org/en
Pianoteq is a high quality virtual piano for Windows, Mac or Linux. Unlike many other virtual pianos, Pianoteq doesn’t use samples, so it won’t take up gigabytes of space on your hard drive. The current version of Pianoteq is less than 60mb! And it’s light on system resources, too. Pianoteq will feature in many of the videos and audio recordings produced by animatedpiano.com. The demo versions of Pianoteq are free to try (Stage is the simpler one, Standard has more advanced features). Full details here: https://www.pianoteq.com/home