Haven’t watched the video but the evidence for knitting in England under Roman rule certainly isn’t there. There were other methods to make knitting-like garments though so maybe this is explained in the video but I doubt that Romans knitted with this
Any Roman male would use only woven wool clothes. Thinner fabrics, like linen or expensive imported silk or cotton were normally used only by women. Men who used them were derided as effeminate.
Moreover, knitted wool is mostly suitable only for undergarments, as it does not offer enough protection against water and wind.
Knitting provided more comfortable clothing, but it was not a necessity. There is no surprise in its late development.
Felting and weaving (or both) are also quite old.
Interestingly, the spinning wheel isn’t: woven textiles produced in europe before the 13th century would have been produced with yarn or thread made on drop spindles: https://en.m.wikipedia.org/wiki/Spindle_(textiles), and anything spinning-wheel-esque probably developed no earlier than c. 200-1000 globally.