Separate your work from everyone else’s
Your commentary can be yours while the clip under it belongs to someone else. That is why reactions, compilations, and "fair use" arguments get claimed and sometimes removed. A claim is not always a strike, and a strike is not a debate you will win in the comments.
Use music you licensed, game captures the publisher allows, and clips you have rights to. Read the DMCA page on StreamersTip if someone is using your work or you received a notice. Counter-notices are a legal step, not a vibe. Get advice before you file one.