These resources offer mindfulness practices in sign language, including yoga poses, breathing, and meditation. While these resources are by and for the deaf community, mindfulness in sign language can be a wonderful way for everyone to practice.
Sign Health is a British nonprofit for the deaf community that has a video series in British Sign Language.
Yoga Pah offers Yoga resources in American Sign Language.
The Systems and Psychosocial Advances Research Center (SPARC) presents an American Sign Language Translation (ASL) of Mindfulness and Health.