If it is, then it's good to see him get back up after that big lose he took. Can't knock him for that.
The only thing I don't like, and I know this is a personal bias for me. "Do what you train"
- Don't train kickboxing and throw away Tai Chi.
- Train Tai Chi against kickboxing and learn to be better at Tai Chi.
If you are doing kickboxing then you aren't doing Tai Chi. I'm looking at his footwork and where he is placing his feet. Look at 0:10 it appears he is in good position to take the root of his sparring partner by sweeping that front leg but he can't because his weight is on the front leg. A TMA approach would have given him the opportunity to do so (those who sweep understand). It also appears that he's practicing stepping on people's feet. I'm not a big fan of it because it doesn't give a big reward unless you are pressing and trying to keep your opponent from escaping. If you get it wrong, then you could lose your root. You can see this happen in the video at 0:13 and again at 0:14.
The only exception to my "Do what you train" mindset is when what you train isn't made for fighting. If he was doing the "fitness Tai Chi" then yeah, congrats on doing something made for fighting, kickboxing. If he was training (I hate term) "combat Tai Chi" or "Applicable Tai Chi" then he should be working those techniques and not abandoning them. Either way it's good to seem him take a loss like this. Something I used to say as a kid when I "beat the socks" off of my friend in a game. "Let defeat make you better, not bitter."
This is said to be the same person.
If this is him then it looks like he's enjoying sparring and probably wished he did it a lot sooner. Sparring is an excellent workout. 99% of the people I've trained, who have done sparring, enjoy it. It looks like he has some decent people working with him.