At the early days of Youtube, its original video player will collapse and you can see a small progress bar at the bottom of the video. Sadly, this unique visualization no longer supported once Youtube changed its player.
…or we may able to “revive” the permanent progress bar on Youtube video. Turns out, there is a free browser extension that can make Youtube progress bar always appear when the video is running (and pointer not hovering).
2. Click Add extension to start the installation.
3. Go to a Youtube video and see it in action!
Now you can see the video progress and the buffering progress at the bottom of the running video. This extension works on theater mode, fullscreen mode, and default view. Meanwhile, the miniplayer has already come with this exact feature all along.