Nexus 6 stuck in 4 color points after loading MX Player from google play store

I was loading a video player (MX Player) that I had on my old HTC android from the Google Play store when something happened.  An error I had not seen occurred.  I didn’t think much of it and I could not do anything with the phone.  The boot load password came up and I entered that and then nothing happened to close the error or exit Google Play.  So, I did a reboot on the phone.  The phone never recovered.  It stayed perpetually on the 4 moving color dots.  I went online and it said that this happened to older versions of Android and just let it run to see if it would recover. I left it in another room for the day and when I came back after about 8 hours it was powered down all the battery was gone.  So, the next recommendation was a factory reset.   I hated to try it but I did.  The phone came back up with the boot load password again, but when it finally got past the google-4 colors-android it brought up the boot loader again with the messed up font (a font that was larger than the one I usually saw which had been happening since the first reboot).  Now it will not get past the four moving colors again.  If you have any ideas please let me know.  I am away from home and have no working phone now.