I may have offered one of the harsher critiques of the video in question. While I could record myself and post it I am not a professional player. Even though I have played for many years I am not at her caliber and I readily admit that. It is a bit absurd that one demonstrate some equivalent professional level of ability before critiquing a piece played by a seasoned pro. Some of us are more proficient on other instruments than the guitar or have many years of other musical study under our belts that inform our opinions. Some simply have opinions based on gut level reactions.
Tatyana Ryzhkova is a highly regarded performer with serious chops. That is why I was harsher about the performance. I generally like her playing and would readily go see her in concert. That I have issues with this performance is simply that. And I tried to state why I found it off putting. The OP asked for opinions on the performance. Some of us have done that. And that is absolutely OK to do without somehow proving oneself before posting an opinion.
The OP was obviously trolling for criticism of Tatyana, and you took the bait.
PS. I think Picasso's painting The Blue Room is bad. Way too much blue. And why is the woman all hunched over? Yuck. Although I'm not as good a painter as Picasso, I have done some painting, and I'm pretty darn good with paper mache. So my opinion is totally valid and very convincing.