So interestingly it seems viewers are getting different quality available to them on some videos. Last night I was watching some vids on ie and was only being offered 720p to watch it, but when I watched on Google Chrome I was offered the full 1080 they uploaded the video at.
@lupin mentioned to me that the video I made linked above was only available to him at 1080p and looked really blocky whereas others are able to view it upto 1440p (and at 1080p was a vast improvement in quality too).
I have taken some screen grabs from it at the same point on the vid.
This is it at 1440p on my PC:
This is at 1080p on my PC:
And this is at 1080p on my phone:
@lupin would you be able to upload your screenshot here too as a comparison? These were taken at 47s into the video.