Please help , vw engine fault .... I suspect it's hippys

[fishmitten]

Please watch this video and help diagnose this ,
Thanks

 

[car.crash]

I take it your loosing coolant ?

 

[fishmitten]

Not much , header tank seems full ( no exhaust gases coming out) no mayo in filler cap , compression normal ....... I do think it's head gasket but not 100%