To demonstrate video functionality, watch the Grand Theft Auto V Trailer by Rockstar video-game company. The first version embeds video, streamed from YouTube – best for websites with traffic limit:
But that also means forced advertisements ― ultimately to surrender supremacy over your website to foreign off-shore corporations! To remain 100% independent and sovereign in all decisions, better upload the video-file to your private webserver and send (stream) it from there.
Low resolution example 640*360, 6.6MB (for Tigo, Airtel, etc.):
High resolution example (HD) 1280*720, 24.9MB (for fast internet).
Click into fullscreen-mode to realise the difference: