Engine noise at the 394 Oldsmobile

Hello must ask again here in the forum. I have a 1960 Oldsmobile Super 88 with a 394 cui. engine. The problem is. When I start it the engine makes a knocking “hard” metallic noise. And then still this ticking noise. So I notice that so. I once made a short video. Maybe someone had such a problem before? I know remote diagnostics are always bad to assess. But maybe someone has an idea. Happy Friday still.