advice for LDR??? help

I've been dating my boyfriend for a year and a half now, and it's been completely long distance. About 4-5 months ago we decided that because we can't really have intimate time that we would send videos of us masturbating and other little things to help close that distance. We agreed to send a video at least every month but normally twice a month. Anyway recently he's been making excuses of why he couldn't send anything, which I didn't have a problem with at first but it's starting to become a pattern. Yesterday he asked if I was going to send anything and I told him I would this week. Today he asked again and said that he wanted it cause "finals are coming up and I won't have time for anything later than tonight" and I told him i couldn't do it (a girl can't be turned on instantly ya know??) and he got really upset. he refused to use any of my other videos because he wants something "new". he's a sweet guy but I don't know of I should be worried or not. I know he's a real person/not a scam and he's always honest with me and we've never had any problems with fighting. should I be worried? what should I do? I need help 😢😔 (sorry for the long post!)