Yoga asana (postures) were originally intended to serve as preparation for truly advanced yoga, which is meditation. Here is a collection of meditations on Grokker:
https://grokker.com/mind/collection/meditations-yin-pranayama/603a8adab356ab7d31b44f1e

I'm not sure how advanced you are looking, but Christy Evans has a lot of Peak Pose practices that have advanced versions.

Hi - You might enjoy these collections:
(a) Ashtanga Yoga Primary Series https://grokker.com/yoga/collection/ashtanga-yoga-primary-series/60061c0c2321c749b61acc00
(b) Yoga with Samara Chopra https://grokker.com/yoga/collection/yoga-with-samara-chopra/6008fe4c3fa6704a3438a5d0
(c) Yoga with Tara Stiles (The advanced videos are at the end.) https://grokker.com/yoga/collection/yoga-with-tara-stiles/60061be12321c749b61acbcc
(d) Yoga by Candace Cabrera Moore Tavino (The advanced videos are at the end.) https://grokker.com/yoga/collection/yoga-by-candace-cabrera-moore-tavino/5fffcbcadb8e8d4f07e52ad8
(e) Yoga with Esther Ekhart https://grokker.com/yoga/collection/yoga-with-esther-ekhart/600923e63fa6704a3438c609

You might also enjoy ashtanga yoga with Kino MacGregor:
https://grokker.com/yoga/collection/yoga-with-kino-macgregor/60061c0c2321c749b61acc00

Maybe you might find what you like in my collection: "Flow Yoga: Intermediate-Advanced":
https://grokker.com/yoga/collection/flow-yoga-intermediate-advanced/60ce41d64cb7214269a7e826
Good luck! :)

Hi Ellen please find a link with our more advanced yoga classes. Hope you can find some here that you will enjoy!
https://grokker.com/yoga/videos