Step 3. Click on Network and then select Media. Step 2. Right-click and select “Inspect Element”. Step 1. Open Firefox browser and find the 1080p YouTube video you want to download. Your computer screen should be at least of 1080p. But this method has 2 restrictions for downloading 1080p YouTube videos: So, you can try to download the audio and video separately, and then combine them manually.
You may probably know that YouTube saves audio and video separately for high-quality videos like 1080P, 2K, 4K, etc.