TPM is built into every 8th Gen. Intel and Ryzen 2000/3000 series CPUs.

7th Gen. and older machines are pretty dire by modern standards unless you had a top of the line i7, or an HEDT equivalent (did they still make those then?). 1st Gen. Ryzen suuucks for single core performance, but for video editing it’s probably ok. But you’d have to pick your codecs carefully. Even modern CPUs chug with certain codecs.