I cannot download MP4 video from YouTube in FireFox browser
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How to Play Mp4 on Firefox in Ubuntu 22.04
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Firefox cannot play HLS file if MP4 alternative is available. · Issue #1581 · mediaelement/mediaelement · GitHub
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Your Browser Does Not Support MP4 Videos: 3 Ways to Fix It
html - Why won't MP4 video work with HTML5 <video> tag on Firefox - Stack Overflow
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How to Download Youtube Videos as MP4 Using Mozilla Firefox?
