If we are willing to extend the effort, God is perfectly able to plant a seed no matter how we rate our 'performance' in retrospect.
The last seed God planted in me before I was saved was through my roommate at the time who is a Christian. From observation, even as an unbeliever, I could sense that this guy was 100% certain he was going to heaven - even though he was far from perfect.
I finally asked him one night how to be sure. He said just two things: when you die and stand before God, how will you answer when He asks why He should let you in? I shrugged. He then said that somebody's blood has to pay for our sins, either ours or Jesus'.
That's it. Never discussed it again. But like your offer, I did know that he was available to elaborate further if I wanted. I didn't. But those two statements haunted me day and night - because I somehow knew I had no good answer for them. Went our separate ways and about a year later, after much seeking, I finally received Christ. Bought a Bible and God graciously confirmed that it was all wonderfully real. Eventually called my friend up, and we have been brothers in Christ for over 30 years now.
My point is, you just never know what our efforts may produce. I'm a firm believer that He uses us at just the right time, and if yielded to the Spirit in prayer beforehand, gives us exactly the right words to say.
Like Keith Green used to sing, "just keep doing your best, pray that it's blessed, Jesus takes care of the rest!" One plants, another waters, God takes care of the growth, indeed.
I added a prayer for the fellow in your vid and his companion, and that the Spirit would even compel him to give you a call. Keep at it!