even though your video is currently unavailable to see, there will be no point rigging it up to another golf, there just susceptible to the circuits/resistors built into the lights to fail, this usually happens over winter when they get frosty.
your either stuck with it or return them, unfortunately you cannot repair this problem, unless you try and split the light apart, also it may start to work as some point as i have a cluster on the indicators that are intermittent