Big light (perhaps square) very unusual colour, VERY fast

the object made a big distance in seconds then stayed in one spot for over 3 minutes, its light was very strong and unusual colour of green. By the time I grabbed my phone I could only film it from a distance but in the first 2 seconds it was VERY impressive.
In the attached video it looks as though the object moves a lot but it didnt, I just struggled to keep my phone up steady, I didn't think I managed to film it at all, only later i realised I got quite a lot. I stopped filming after it disappeared, so the whole even was no longer than 4 minutes from my viewpoint (my bedroom window!)
I don't know if this is related (and i doubt it is), but I had no WI FI connection for a few minutes after this (mobile data was fine, that's how i sent my video to family and friends).