Is this service analogous to Instagram or am I making a mistake?
Most likely YouTube. But Instagram similarities are noticeable. I see nothing wrong with creating a single platform that is ideal for all users!
You will not please everyone. There will be those who will be dissatisfied with something. Well, I think that this will be considered as constructive and useful criticism, which will be perceived as the requirements to become better!
In any case, there is a category of people on the market who are not happy with everything and are very critical of everything