Wrist lag - tennis forehand

I recorded my hitting session last week. After looking at the first one, I noticed that I had little wrist lag, more controlling. On the first one, I used CX 200 Tour while the opponent was using RF97 and feeds powerfull ball, I just returned his balls (Pic 1). The second one, I was using a heavy MFil 300 but the same opponent was using a light racquet. After seeing the first video, I tried to give a wrist lag (Pic 2). I remember, I had done this before but was using PS97 or Six One Lite, both gave me sore wrists. Using wrist lag gave you extra power but beware of the wrist injury especially with stiff racquet. The link to yt is https://www.youtube.com/watch?v=1la9xChBbmY. However, see this video because this might cause my previous injury https://www.youtube.com/watch?v=5V8Ij3Raw6w from intuitive tennis.