black hole stars a.k.a quasi stars
Channel: AstroTime
Date: 2023-05-24

a quasi star or also known as a black hole star, is a type of hypothetical star object that is very large and very luminous, this star may have appeared in the early history of the universe and has a black hole at its core. They have a temperature of 4,000 kelvin, but they can be much larger than hypergiants and supergiants with an estimated radius of 10 billion km or 7,187 times that of the sun. The mass of this quasi star is estimated to be 10,000 times the mass of the sun. Unlike modern stars, whose energy is generated by nuclear fusion in their cores, a quasi-star's energy would come from matter falling into the black hole at its core. 

Video source: what if, melodysheep, Nasa, and others
Music background: signal to noise -scott Buckley