Volume booster/sound booster

I mainly use YouTube. The app is not very loud or is hard to hear. I started using brave for ad blocking and I noticed that videos on YouTube play at a louder volume in the browser than they do in the app. But some videos are still very quiet and hard to hear. I looked at volume boosters in the play store but I don’t trust these to have great privacy and they have ads and trackers. Google doesn’t make a volume booster that can be used with the phones built-in speakers. Google only makes a sound booster that can be used with headphones. A volume booster built-in to the browser would be helpful. Or even a separate one in the play store that doesn’t have trackers and ads would be great.