Comment # 5 on bug 905665 from Manuel Bernhardt

Working system 1 (Laptop Lenovo)
CPU 

vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Core(TM) i3-3227U CPU @ 1.90GHz
stepping        : 9
microcode       : 0x1b
cpu MHz         : 1821.253
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 1
cpu cores       : 2
apicid          : 3
initial apicid  : 3
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm
constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16
xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave avx f16c
lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept
vpid fsgsbase smep erms
bogomips        : 3791.27
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

Package Versions (flasg & firefox)

flash-player-kde4-11.2.202.418-2.11.1.x86_64
flash-player-11.2.202.418-2.11.1.x86_64
MozillaFirefox-33.1-5.1.x86_64
pullin-flash-player-12.3-6.4.1.x86_64
MozillaFirefox-translations-common-33.1-5.1.x86_64
MozillaFirefox-branding-openSUSE-21-4.1.2.x86_64

YouTube works, also other packages with different flash applications.