To give you the best viewing experience possible on your computer, YouTube adjusts the quality of your video stream from standard definition (such as 240p or 360p) to high definition (720p or 1080p), based on the speed of your Internet connection. This is why you may notice that the quality of your video changes as you watch videos.
Tourbuzz exports videos in high definition (720p). To determine the quality of the video you are viewing on YouTube, take a look at the gear in the bottom right-hand corner of the YouTube video. This gear will tell you if you are viewing the video in SD or HD. For better quality select 720 - HD.