Chlorination of vinylacetate to form Chloroacetaldehyde

Does someone have experience with the chlorination of vinylacetate to make chloroacetaldehyde?

One article mentions that this reaction is better carried out in two steps. Chlorine is first added to vinylacetate at room temperature with cooling to form 1,2-dichlororethylacetate, which is then hydrolyzed at 50-60°C to form chloroacetaldehyde.

Can someone explain me this two steps reaction?
Do you make HCL in step 1?
In step 2 you make besides chloroacetaldehyde also acetic acid and HCL?

Thanks