He sends me photos/videos of what’s he’s doing but there’s no messages?

This guy I am talking with, I began messaging about a month. Our conversation are on Insta, and it was consistent. He’s busy with work and so am I, so it was clear and understandable when we don’t have time to message back right away. One time he didn’t reply back, and sent out a photo instead of replying back to my previous messages. I just looked at it and didn’t reply back. After few hours he noticed and immediately messaged my previous messages. After that, we began messaging frequently. It came to the point of him just sending me photos or videos of what he’s doing during the day and would have a text in the photo relating to it. Now, he’s just sending me photos and videos with no message at all. And I’m just confused what this mean. I’m just looking at them and not responding back because when I do he doesn’t seem to be interested in replying back. Should I just let it go? I actually did like the guy, and I thought we had a connection but I’m not sure what happened and If he’s not interested anymore then why send me photos and videos?

He sends me photos/videos of what’s he’s doing but there’s no messages?
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