Classical Gong Fu from Kuo Lien-Ying
Randall Fung is one of the most senior students of Kuo Lien-Ying who still lives. Henry Look said he was the closest in his performance of Guang Ping Yang Taijiquan to Kuo's own flavor. Marilyn Cooper jokingly called him "Kuo's clone" when I asked her what she thought of his gong fu. I highly recommend Randall's videos as a guide to not only a good gong fu foundation but also an insight into what training was like prior to the wushu takeover. I do not own these videos, just providing recommendations.

Zhaquan 10 Road Tan Tui
Tan Tui is said to be an effective foundation for learning Northern Chinese martial arts. Randy teaches the 10 Road Tan Tui in this playlist.
Zhaquan Forms
Randy Fung demonstrates more of the Zhaquan that Kuo treasured. These forms work on the foundation built in the prior lessons and provide further insight into this extended posture fighting style.
Guang Ping Yang Taijiquan
Randy provides expert instruction in the Guang Ping Yang Taijiquan style. Here we see performance very similar to how Kuo taught in San Francisco.
Xingyiquan Five Elements
Xingyiquan is one of the most direct and applicable Chinese internal martial arts. The Five Elements or Wuxing Quan are the core of this art and will start you on the road to transformative power. Xingyi can be an expansive art for those looking to become instructors. For those looking for a power boost and to better understand power - the Five Elements are enough. The first set of videos from Byron Jacobs represent standard Li Cunyi descent Hebei Xingyiquan. None of these videos are mine.