To help you find what you're looking for, could you clarify:
Filenames like this are typically generated automatically by iPhones, digital cameras, or screen recording software (formatted as YYYY-MM-DD HH.MM.SS ). Without more context, this looks like a private or internal file from a specific tutorial, community, or personal project. 2021-10-21 14.57.40.mov
Are you trying to for this file or understand the instructions contained within it? To help you find what you're looking for,
(e.g., a Discord server, a YouTube description, or a school assignment?) a Discord server
(e.g., a gameplay walkthrough, a technical manual, or a styling guide?)
(e.g., a specific video game, software like Serato, or a DIY project?)