D.C.
My daughter absolutely hated tummy time. We were able to get her to stand it a little longer by my husband sitting on the couch with her laying on her tummy looking out across the living room. I think she liked it because she wasn't doing a face-plant into fabric, and because from that angle she could look at the TV! It helps that my husband is tall, so she had a long lap to stretch out on. I had some success putting her on the Boppy with a book in front of her.
Once she could roll over on her own, that's all she wanted to do. She rolled from her tummy to her back first, and then started rolling from her back to her tummy a few weeks later. As soon as she started rolling onto her tummy, she became obsessed with trying to move.
Don't worry, what he's doing is entirely normal for his age. I think that stuff about them getting an hour a day of tummy time is wishful thinking at that age. My daughter never did an hour of tummy time until she started trying to crawl, and she's crawling and standing up at 8 months. He'll get there in his own time.