List and document members, channels & videos examples to be used in designs

When showcasing members or content in Atlas designs, the general rule of thumb we've been following so far was to use real-world content, as opposed to showcasing designs based on fake videos, or users.

The goal of this task is to take a step further and put up a list of the ideal members, channels, and videos we could be using in Atlas Figma designs. This is to ensure that, going forward, once the designs are shared outside publicly (eg. Twitter, Discord, YouTube, etc.) as they are, with no prior preparation and validation, we're still telling the same story through the content we're visualizing, as opposed to eg. having the same video thumbnail being labeled differently in each Figma file.