Home DIY

Friends don't let friends terminate twisted pair cable into 8P8C plugs. Without lots of practice it is likely to go wrong and end up with a poor connection which somewhere down the line will be intermittent. Decent crimping tools are also quite expensive.

Punch down cables in your walls/floors to sockets which is much easier to do and buy factory terminated patch leads. If you can't screw the box to the wall you can use a surface mount socket as a flying socket, something like https://cpc.farnell.com/pro-signal/psg08000/socket-surface-rj45-cat6-single/dp/CS16167

If you crimp the cable clamp properly, the copper tape is superfluous. Weird video really, goes into great detail about various bits then just bends the cable clamp with 'finger power'.