[Refugee]

There is a lot of capacitor streaking on the video most likely from capacitors in the RGB drivers.
Quite a lot of CRT sets will only need the RGB driver circuits on the tube base circuit board fitted with new capacitors for a complete cure.
The circuit board will need to be very carefully removed from the tube base and can in most cases can be worked on without removing the chassis.
Just make sure no side ways force is applied to the tube neck because it is fragile and the set will be scrap if you break it.