How can I reduce video size for mp4 file on my pc?

Let me talk you through using PowerPoint to reduce MP4 file size on your Windows PC. PowerPoint has a hidden "Compress Media" feature that most people don't even know exists . It's completely free (assuming you already have Microsoft Office installed), and it's built right into the software, so no sketchy downloads required.

Step 1: Open PowerPoint (any recent version works) and create a blank presentation

Step 2: Go to Insert > Video > This Device and drop your MP4 file onto a slide

Step 3: Click on File > Info in the top menu

Step 4: Look for the "Compress Media" button. Click it, and you'll see three quality options :

     Full HD (1080p) - Keeps good quality, moderate file size reduction

     HD (720p) - Decent quality, better compression

     Standard (480p) - Smallest file size, noticeable quality drop

Step 5: Pick your poison, and PowerPoint does its magic. Once it's done, you can save the video by right-clicking the clip and selecting "Save Media as" to export it as a new MP4 file.

Here's what actually happens when you click that button: PowerPoint lowers the video's resolution and bitrate . The 1080p option is basically the default quality you'd expect for web videos, while 480p is where things start looking a bit fuzzy.

Yes, you can technically use PowerPoint to reduce MP4 file size without installing anything new. It's free, it's built-in, and it works about 60% of the time. But it's slow, clunky, and you'll be sitting there manually processing each video like it's 2005.