I see the point of the advice from welch. Those are good active isolate style stretches for the hip complex.
However, can you tell us more about your status?
For instance, these ais that welch explained may not be good for someone with spondolythesis (degenerative disc) or excessive lordosis.
If you have lower lumbar pain it may not be best to add flexibilty to an already unstable joint....so any leg rotation type stretch may be contraindicated (
counter productive) for the time being.
See a pro is good advice as well.
Like I said, if you can give more details we probably can help better.