Does watching kisses, embraces, and touches between a man and a woman on the internet or in TV series, and actively seeking them out, constitute a sin comparable to watching pornography?

Watching the aforementioned clips is an act of disobedience to Allah the Almighty. The questioner must repent and seek forgiveness, and not underestimate minor sins, because persisting in them destroys their perpetrator and may lead to committing grave sins.