If I took yoga teacher training through a studio and became certified from that training, would that be considered a legitimate educational institution to receive an education tax credit?

To claim an educational deduction or tax credit, you must claim your own exemption you must attend an Eligible Educational Institution

An eligible educational institution is generally any college, university, vocational school, or other postsecondary educational institution eligible to participate in a student aid program administered by the U.S. Department of Education.

Nearly all accredited public, nonprofit, and proprietary (privately owned profit-making) post-secondary institutions are considered eligible schools.

See Eligible School Directory