The first video in the twitter thread you link to was extorted from the winning opposition candidate by senior Belarusian officials in the office of the Central Electoral Commission.

The declaration she made after arriving in Lithuania is here https://www.youtube.com/watch?v=9DzisJ388Xs

In it, she roughly says "I thought I've been hardened by this campaign and that I will handle it. But I am still the weak woman that I was initially. I made a difficult decision. God save you from the kind of choice I had to make. Take care of yourself. Kids are the most important thing that you have in life."

And indeed, the internet is completely down in Belarus. Phone network still works.

Ah, so they threatened her kids. Sickening.

At some point in the past, she said that her kids were safe abroad, but it does not take a big country to successfully track and extort people anywhere in the world.

I believe her husband, who she has been running in the stead of after he was (unjustly) disqualified, is currently imprisoned in Belarus. That is probably one of her concerns.

This is true.