The flat-footed squat you show in the video is a pretty good starting point - good enough that I didn’t even watch the one with raised heels. The mobility to do what you need to do will come with practice. Don’t try to shortcut it by raising your heels to make it easier. Learning to do movements correctly and with significant weights is difficult for most people. The ones that get good at lifting have gotten good because they’ve persevered and kept pushing, despite it being hard to do. If it was easy, we would all be jacked and squatting 1000 lbs as part of our warmups.
In summary, your squat looks fine for now. Keep pushing and don’t use any artificial crutch to make it work. Mobility comes with time.