Disable browse:media:youtube system health smoke test

tools/perf/benchmarks/system_health_smoke_test.py

Index: tools/perf/benchmarks/system_health_smoke_test.py
diff --git a/tools/perf/benchmarks/system_health_smoke_test.py b/tools/perf/benchmarks/system_health_smoke_test.py
index 6da740b1f40a76ad380796c0968169cb371a57cd..74026c97acf82726e66fd24637cf7449beeb9192 100644
--- a/tools/perf/benchmarks/system_health_smoke_test.py
+++ b/tools/perf/benchmarks/system_health_smoke_test.py
@@ -41,7 +41,8 @@ _DISABLED_TESTS = frozenset({
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_mobile.browse:news:nytimes',  # pylint: disable=line-too-long
   # crbug.com/637230
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_desktop.browse:news:cnn',  # pylint: disable=line-too-long
-
+  # crbug.com/666293
+  'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_mobile.browse:media:youtube',  # pylint: disable=line-too-long
   # Permenently disabled from smoke test for being long-running.
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_mobile.long_running:tools:gmail-foreground',  # pylint: disable=line-too-long
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_mobile.long_running:tools:gmail-background',  # pylint: disable=line-too-long