HDMI 8 Port Video splitter test + 20 Meter HDMI cable test

Testing a 8 port HDMI splitter with builtin amp and 10 Meter + 20 Meter HDMI cables. Works perfectly. Video + Audio, 60 FPS, etc. No visible degradation of quality. Using 3 same model TV's audio and video is perfectly in sync. Mixing 10 Meter and 20 Meter cables does NOT cause audio or video problems. Perfectly in Sync. Mixing different model TV's proved that not all TV's are equal and they all time their audio and video differently. Works fine, but audio is not perfectly in sync when mixing different model TV's. Usable, but preferably not in hearing range of the other model TV's. The same applies to video.