A comprehensive video on Buran, from a Youtuber that does a lot of deep-dive on mostly cold-war tech.

I personally strongly recommend his videos on the B-29 firing system[0] and tri-propellant rocket engine[1] as well.

[0] https://www.youtube.com/watch?v=QKRszjV07ZQ

[1] https://www.youtube.com/watch?v=KX-0Xw6kkrc&t=2109s