Add graph view example video (with subtitles) to `CHANGELOG` #15614

Job	Run time
paths-filter	5s
Checks / Check if running codegen would produce any changes	1m 14s
Checks / Lint markdown	23s
Checks / Rerun lints	47s
Checks / Spell Check	7s
Checks / Misc formatting	36s
Checks / markdown-paths-filter	5s
C++ tests	0s
Minimum CLI Build	0s
Python Checks	0s
Build rerun_js	0s
Build web viewer	0s
Deploy Landing Preview	0s
Rust Checks	0s
Minimum Wheel Build	0s
Upload Web	0s
Minimum Wheel Test	0s
Checks / Check links	22s
	3m 39s

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