Glowing orb approached aircraft spotted from Porter Airlines flight from Toronto-Newark

I was on a Porter Airlines flight PD2141 from Toronto to Newark, it was descending, only a few minutes from landing. The time was 7pm EST. The city was passing by below.
Out of my right side window, I saw an orb of yellow light approach the aircraft from the back-right side. At first I thought it was some kind of distortion through the plexiglass mirror of another aircraft or helicopter, but it was clearly an orb. With regard to is size, either it was larger and further away, or it was smaller and closer to the plane -- I am unsure. But I saw it again the backdrop of the moving city lights below, which is how I got a sense of its relative distance and movement in relation to our aircraft.
It looked very similar to what was filmed in this YouTube video of a separate incident: https://www.youtube.com/watch?v=mUBFjz1os5c 
After a minute or so, it passed out my field of view, toward the back of the aircraft. I do not know if anyone else saw it. It was quite terrifying.
I contacted the airline after to see if the pilots reported anything.