In thisvideo you stated that shia do not pray taraweeh because mustahab prayers can not be done in jamaat. What about eid namaz? Is it not mustahab and performed in jamaat?

The Eid prayers were originally wajeb. At the time of the Prophet (s) it was mandatory to attend and pray them. They are mustahab today due to the ghaybah of our Imam. So because they were originally wajeb, they are prayer in Jama’a.