Users on platforms like Instagram often use variations of their name and age (e.g., @m.ellena16 or @elena.s16) as handles.
It may simply be the name of a personal video file or a generic placeholder for a 16-year-old named Elena. Elena of Avalor TV Review | Common Sense Media Elena (16) mp4
At the start of the series, Elena is a high school student roughly 16-17 years old. Users on platforms like Instagram often use variations