This isn't really a bug but a minor annoyance with the video player.
If I set the video player to use Youtube (my preferred player), it obviously can only do that for free videos. If I try to watch a premium video or one that isn't on Youtube after having set this, it then switches to using Streaming at Auto quality. If I switch it to HTML5, my preferred premium player, then the next time I watch a video that exists on Youtube, it'll use the HTML5 player. It's working exactly as it should because I did change the preferences to use HTML5, but it's not a particularly great experience for me.
Not to get all armchair designer on you all, but a priority setting or just a "Use Youtube where available otherwise this" setting would work to solve this issue. It's not a massive issue since I can just check the Giant Bomb channel on Youtube to see if a video is on there, but it is slightly annoying.