vk,
Yes

.
1. The "original" was yamuna kalyani.
2. The "fake" was bilahari.
3. The segment is approx. 1:50...2.16.
Bringing suddha saveri/sankarabharanam into this discussion may confuse many things may not be relevant. Please read the discussion of Yamuna kalyani carefully - you cannot do some of these shruti bhedams without taking subtle but permissible liberties with arohana/avarohana structure which may be possible in one murchana but not another.
On yamuna kalyani
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I don't know much about this rAga and I'm not sure of the ArOhana/AvarOhana or that there's even a strict arohana/avarohana. I've just heard enough of it to feel comfortable playing snatches of it and sneaking in a small bilahari-like refrain within it. Nominally, I think the arohana/avarohana is identical to kalyani with a bhashanga M1 thrown in.
In actual usage (from what I've heard), however, things are different from the strict ArOhana/avarOhana. If we're stuck with a strict arohana/avarohana the fleeting bilahari shift would not have been possible. So what are the actual usage aspects which permit a bilahari shift:
1. Instead of SRG we very often play NRG, almost as if it were a nishadantya raga, along the lines of yaman. This NRG usage is one factor which permits the bilahari shift (corresponding to GPD in bilahari). But wait, there is another, subtle, usage liberty which needs to be snuck in.
2. The second usage aspect is more subtle and needs to be artistically executed or will lead to a loss of identity of yamuna kalyani. This is in regards to dropping the madhyama in the arohana. Normally, sangatis progress per arohana as G M2 P, etc.. but when executed carefully and artistically (I hope

), we can do N R G P, , , P M G R. This usage is absolutely essential to sneak in bilahari because that NRGP in YK corresponds to GPDS in B (if you insist on NRGMP in YK that would translate to GPDNS in the shifted tonic which is strictly prohibited in bilahari). Go back and listen to the clip and notice how in the initial stage of the rAga I have played NRGMP and then changed to NRGP . All this has to be understood aurally and not intellectually.