I just now did a speed test and it was 100.7 Mbps download. Like I mentioned earlier YouTube seems to be fine. I also just now logged into Facebook on Chrome and it could not connect at all so I'm thinking that something in Facebook is not compatible with chrome or Chrome is messed up.It may be in issue with your internet connection if you are having problems. Have you done a speedtest lately? Are you getting close to the speed you are paying for? You can also try videos on youtube and other sites.
I reset Chrome and everything seemed to run smooth although I had my doubts because I think I did this before about 3 months ago I then watched a 15min Facebook video and I lost internet 3 times. I think I’m switching over to Firefox for everything and see what happens.Reset Chrome and try again. Also look at installed extensions and see if anything unknown is there.