Doubt regarding Islamic bussiness rule

Assalam o alaikum, I got to know from Zaid Patel lecture on ' Tijarat ke islami osool ' video no. 20 and also from Shiekh Abu Umar Abdulaziz lecture on ' fiqh of running bussiness...' video no. 16 that in Beassalam(manufacturing) practice debt from both sides(seller as well as buyer) is haraam. Does this applies for trading and service also? Video links=https://m.youtube.com/watch?v=YSuQfOQa4tc&list=PLjc7oSoRGqpFc2O0LN7eoP00fRdVEZ03V&index=20 https://m.youtube.com/watch?v=L5YPGooCM7g&list=PLBy4GHLUPhqW-N8y9Brb1C5YNziP-ynXt&index=16