Yes. For a personal brand, the useful output isn't a market report; it's a better decision about what to make next and who it's for.
Start with one question, like 'Why would someone comment instead of just watch?' Read discussions around ten relevant posts from several accounts, including smaller ones. Note repeated questions, disagreements, vocabulary and examples people volunteer. Don't assume a competitor's most liked post is their most useful one, or that visible comments represent everyone watching.
Turn one pattern into a small test. If people repeatedly ask how a creator got started, try a concrete beginner walkthrough and an honest mistake breakdown. Keep the audience and topic similar, then compare relevant comments per reach, profile visits and follows rather than raw likes alone.
You can also ask your existing audience an open question and compare their answers with what they actually respond to. Research gives you hypotheses, not a formula. Use the patterns to develop your own angle rather than copying somebody else's posts.