Samurai Leggings - Kyahan 

Yes, but historically they weren't Velcro obviously, they were tied closed almost like shoe laces. Often though some farmers or samurai would wear some variation of Tattsuke Bakama, which are hakama pants with the part below the knee being essentially a kyahan sewn into the trousers as they're more comfortable than having lots of loose fabric and cant really come undone during battle. This is so the trousers dont get caught on anything when working, travelling or in battle and also helps when its cold, and helps as Mr Norcross mentions in the video to stop bugs crawling up the trouser legs. Wearing Kyahan makes it much easier to wear suneate (which is a form of shin/knee armour.) In extension to this there is also Tekko which is essentially the same thing as a kyahan but for the arms which serves all the same purposes but for the arms rather than the legs, Samurai wore very baggy clothing so it was important to remove the slack in a fight, to the point where depending on formality, rank and occasion, the amount of pleats and length of the trousers was different. I find that tekko especially are very useful to take away the opponents ability to easily grab your sleeves, which from my training at least seems to be the most reliable way to grab an opponents wrist from a punch, as grabbing the wrist itself is really difficult from a full speed punch. Hope this response helped! If you look up some old "Samurai Ukiyo-e" woodblock print artwork from a couple hundred years ago you will see proof of these depicted in artwork, almost everyone is wearing them :)