Currently Im using Chrome. Sometimes when I attempt to load a youtube video, my computer would have super lag for around 30 seconds and the video wouldn't play. This happens at random times for a few minutes and then everything would be normal again. Does anyone know what might be the cause of this? I believe this has happened before when I tried to open a twitch stream as well.
Is your browsing performing well? No really laggy browsing elsewhere? Run a speed test via speedtest.net and post results. As i7Baby said, run a scan with MalwareBytes. Is your Chrome up to date? Do you have x64 bit of Chrome if you are running x64 bit system?