I done made a loop of where I think I see the world "HELP". It also makes me think the previous message was "HELP THIS WAY" not "HOLD THIS WAY".
Here's the loop. if anyone has the ability to edit colours on GIFS that might made it easier to read. I also have it in .mp4. It helps if you tilt your screen back to see like those stupid pictures with hidden things.
I found a loop was the best way to capture this word appearing, as when you screenshot the frame on it's own the text looks completely lost in the image. With it flickering on and off screen you can separate it from the rest of the picture more.
It still could be hold, or held, or hello. It's so hard to tell.
Also, does anyone know the origin of the music used in this clip? Is it a new piece? I don't recognise it.