I would wait and see how it performs, the r5 that is. It will likely perform a bit worse in games and a bit better in video editing so you may have to decide which is more important to you. The r7's did ok in some games, in others it fell behind intel including i5's. These things may or may not be fixed in the future. Some of ryzen's issues deal with ram speed, it has difficulty using faster ddr4 without crashing and becoming unstable due to the way it's designed and the memory speed is tied to the nb speed.
It's not quite as bad as choosing between intel and fx, ryzen's made some improvements but it does have some hiccups. In a way it's still a matter of choosing cores/threads vs single core performance. Banking on things being fixed in the future is a bit of a roll of the dice, it may or may not. Similar to downloading a game that plays poorly and keeping your fingers crossed they 'fix it' eventually. They might fix it in a month, in 6mo or not at all.
I can't say for certain since I'm not sure if some of the ryzen issues can even be fixed via an update or bios tweak. If for instance the memory issue is a design flaw in the architecture I'm not 100% certain if it can be fixed with code or if it's something they would have to correct in the cpu's design. As others mentioned motherboards can be a bit pricey and there's a number of them that are unavailable at the moment which limits choices. All hardware generally has a bit of a bumpy start when it's brand new.