Easiest way is to use Chrome or a Chrome based browser since they bundle codecs with the browser. If you're using Firefox, need to make sure you have the codecs. I know nothing about Mint specifically though to know if they'd automatically install codecs or not.

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lights0123 6 days ago | parent | next [-]

You specifically don't want to use the bundled codecs since those would be CPU decode only.

	▲	dismalaf 6 days ago \| parent \| next [-]
		Straight up false. I have both Chrome and Vivaldi installed on Linux, both have hardware video decoding on OOTB... You check it by putting chrome://gpu in the address bar.
	▲	throwawaylaptop 6 days ago \| parent \| prev [-]
		Interesting. I'll look into that more.

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throwawaylaptop 6 days ago | parent | prev [-]

Im using Brave and it seems the enable hardware acceleration box is checked.