Chen ZiQiang is the son of Chen Xiaoxing and nephew of Chen Xiaowang. He’s also the great grandson of Chen Fake. (In case you’re wondering, as I was, that’s pronounced Fah-kuh.) Kungfumagazine.com has a good article (from 2006) on Chen ZiQiang: What it Takes to be a Taiji Master in Chen Village.
A lot of video has been posted, and continues to be posted (he is young and active), on YouTube. As recently as May 2015, an hour-long tutorial on Laojia Erlu was posted. He demonstrates each move multiple times, slowly, with names in both Chinese and English.
The intro is long, with history of Chen Taiji (interesting!) and Chen ZiQiang’s lineage and credentials. The actual breakdown begins around the 18-minute mark. The English translations of names vary from what I’ve seen elsewhere, but the Chinese names are the same. It’s my first opportunity to learn how to pronounce them correctly.
I learned about Chen ZiQiang when Grandmaster Gohring (my teacher) sent around the link to Chen ZiQiang’s demo of the double sabers, which we are working on in class. Other Chen ZiQiang video links to study:
The Chen sword demo is another step-by-step tutorial. Laojia Yilu and saber are just demos. For those who like to do push-hands, YouTube has a whole slew of Chen ZiQiang Tui Shou video.