so we're kind of back to USB 2.0 reliability. Later cheaper China knockoff BIOSes back slid. usually it boiled down to just get the manufacturers "software tool" to make the BIOS allow anything connected to the USB-c port to access the PCI express bus. the BIOS had to be set to either "Allow all connections" or only "Allow thoroughly certified devices" On Apple Mac's this wasn't an issue. but they also enforced "security" on the USB 3.1 (USB-C aka TB3) port. USB 3.1 started to take back the brand and forced a lot of mandatory changes to the specification. which usually mean their chipsets only worked with their brand of USB 3.0. Manufacturers cost cut and made non compliant chipsets and declared "partial" support for some devices. it let manufacturers call literally "anything USB 3.0 standard" which was a disaster. USB-C (TB3) on a PC is a little drama because the USB3.0 specification was such a gawd awful mess of a specification. If you want to continue to capture DV, the adapter combo. I just aim a USB powered external fan at them. but its good to plan to keep them cool somehow. The one draw back is the adapters tend to get very warm on long captures. its faster than AGP used to be and its very stable. PCI Express was the "serialization" of the PCI communications format thats been in Mac and PC's for years. The combo of the two adapters essentially adds an old (well recognized) Firewire IEEE1394 chip to a simple PCI Express bus connection through the Thunderbolt port.
but I've used the Apple Firewire to TB2, to TB2 to USB-C (TB3) on both legacy Intel MACs and just about every Windows PC, desktop, laptop that has a TB1, TB2 or USB-C (TB3) with success. All the capture devices that I have seen for Macs that have a Thunderbolt interface are much more than $100 If you won't miss DV capture then to capture SD analog video and analog stereo audio with a device that costs $100 or less, you'll need a USB device that supplies uncompressed digital input to a computer for the computer to encode. All the devices for Macs (that I know of) which permit capturing analog video and audio as DV and DV transfer from a camera are old and use a Firewire connection as their computer interface. If that doesn't work then you'll probably need to give up DV capture with a Mac.
If you want to continue working with DV, then see if daisy-chaining cables works to connect the DataVideo DAC-200 to your new M1 Mac Mini. When I had the older mac, I would have to copy things to the newer Mac. Well, to be honest, I want to change my workflow. It might be worth buying an old Mac computer with Firewire and an older OS that has known compatibility with DataVideo DAC-200 to avoid changing your workflow.
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