New
#11
Anything is still viable before 8th gen if you are going to use it on 7, 10 or Linux. Considering they want to use 7 i disagree there is a whole range of options, 6th gen is the sweet spot and the last officially supported generation.
You get older parts but they are still good Skylake is still a solid generation plenty of power there for video editing. You could go back as far as 4th gen and still have a solid rig. If all they doing is locking to window 7 then the 8th gen lock out does not matter.
4th gen x99 or x79 quad channel is a powerhouse and in the right market it would be a cheap build. On paper they wont bench like a new computer but on a actual real workload like video editing it will be a fast system if you got the right setup .