PCIe adapter with four slots - Storage

Any adapters for a x16 PCIe slot split in multiple smaller ones? can you put a pcie x4 in a x16 slot Have you ever thought if you can plug PCI Express cards into x16 lane slot? In this video candy baby slot Next Generation Storage：1*PCIe x4 and 2*PCIe x4 Connectors EZ-Latch：PCIe x16 Slot & Connectors with Quick Release & Screwless Design

canyon slot Have you ever thought if you can plug PCI Express cards into x16 lane slot? In this video