Use 720p (1280 x 720 pixels) . Full HD (1080p) is often overkill for background loops and wastes bandwidth.
Many "no-code" platforms have built-in support for .mp4 background assets: Bg 2.mp4
Always remove the audio channel. Browsers will not autoplay background videos with sound, so the extra data is unnecessary. 2. Implementation via HTML & CSS Use 720p (1280 x 720 pixels)