H265 will also be playable in 10+ years. No need to waste time and energy for AV1 now as it is too slow now.
And it's not like old codecs like mpeg2, xvid/divx suddenly are not playable these days.
Depending on the recodings I would also keep the source files if possible. A external 4tb hdd is not expensive these days.
I would go with h265+mkv+flac +(forced (soft) subtitles with a date, turned out to be very usefull if rewatching it in X years)
Last edited by ChaosKing; 21st May 2019 at 23:11.
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