Balaji has been slowly uploading classic shows. At the time of writing, Kumkum has a partial official playlist.
If you are looking for specific episode summaries or cast details to help you find a particular moment in the show: kumkum ek pyara sa bandhan all episodes link
Since finding a continuous link is hard, here’s a breakdown of key episodes. Use these to search for specific episodes on Hotstar or YouTube. Balaji has been slowly uploading classic shows