Improve H264 streaming fallback #193

Job	Run time
Rust lint and unit tests	43s
Client lint, build, and tests	25s
Packages and VS Code extension	28s
Build integration artifacts	1m 48s
JS API simulator integration	6m 11s
CLI simulator integration	7m 22s
CLI simulator integration	8m 19s
Packages and VS Code extension	28s
Rust lint and unit tests	43s
Client lint, build, and tests	25s
JS API simulator integration	6m 11s
Build integration artifacts	1m 48s
Build integration artifacts	1m 48s
CLI simulator integration	11m 14s
Client lint, build, and tests	25s
Rust lint and unit tests	43s
Packages and VS Code extension	28s
JS API simulator integration	6m 11s
	55m 40s

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