Challenge 2: The Webcam Position Not Updating Across Scenes — Solution Walkthrough

The most likely reason:

Per this chapter's own warning box, this is a classic sign that the
webcam Source in "Main Content" and the webcam Source in "Be Right
Back" are actually two separate, unlinked Sources that merely look
similar — not the same reused Source appearing in both places. If
they had genuinely been the same literal Source reused across both
Scenes, adjusting its position in one Scene would have updated it
everywhere it appears, including in "Be Right Back."

Why this happens so easily:

This chapter's own material describes exactly this common beginner
mistake — instead of reusing the existing webcam Source when building
the second Scene, a fresh new webcam Source of the same type was
likely created separately for "Be Right Back," which creates a
completely independent Source with no connection to the one used in
"Main Content," despite both being labeled similarly and looking
identical at a glance.

The fix:

When adding the webcam to "Be Right Back," choose the option to add
an existing Source and select the already-configured webcam Source
from "Main Content," rather than creating a brand-new Source of the
same type. This links both Scenes to the same underlying Source, so
future adjustments apply everywhere it's used.

WHY THIS WORKS AS AN ANSWER
------------------------------
This exercise directly applies this chapter's own warning box to the
exact symptom it predicts — inconsistent behavior between Scenes that
look like they should be linked but aren't — correctly identifying the
root cause and its fix.