Apps I can't do much about, but as for browsers, I downloaded this extension a while back so I could watch YouTube videos at higher than 2x (it can go up to 16x, in adjustable increments down to 0.01x (default 0.05, I set it to 0.1)), and quickly discovered that it works on all sites that play video, including Netflix and Disney+, which has been very handy. If you use a Chromium-based browser, there's no doubt an equivalent -- I just found it through the highly scientific method of typing "video speed control extension" into Google, installing the first couple hits, picking which one I liked best, and uninstalling the others.