I’m loving a new service I have just discovered www.FitStar.com (recently purchased by FitBit.
The basic premise is that you do a fitness test and then there are tailored video workouts generated for you. On completing each move you record your actual results and perceived effort and this feeds into your next session.
There is a free tier and a premium tier which unlocks more workout sessions.
If you fancy a premium subscription then please use my referral code