Be very careful believing anything like that on youtube !! It depends on what is in the particular batch of lacquer thinners.
Best way to clean a clogged cat converter is to get it very hot & run very lean. If its contaminated with leaded petrol or something similar, bad luck!!

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving