Firstly let’s not forget YouTube is a free media platform which allows creators to show their growing methods / hobbies and should not be mistaken for professional advice and remember some you-tubers receive paid promotions to (push) sell products, and have amazon associated links in their video description, so be very careful what you buy.

Orchids need a good balanced fertiliser that includes trace elements, look for the NPK Labels and it should not “in my opinion” contain Urea, it is recommended by many growers to feed “weakly weekly” at 1/4 strength. Fertilisers are a personal preference and remember it should be readily available to purchase. I only mention what I use in my videos and thats what I was advised to use when I first started Growing and I have continued to use it, sorry I cannot be more specific.