VP9 has pretty wide support, probably due to the Google (and YouTube) backing. I sincerely doubt devices will phase out any codecs, especially not VP9.
AMD video cards have supported hardware decoding of VP9 since vcn1.0 - well before they had support for decoding AV1
AV1 and VP9 are likely going to be your highest efficiency “free” codecs. AV1 is the way to go if you mean free as in free open source. It’s not very likely to be implemented in many TVs or set-top-boxes, but VLC/ffmpeg will be able to decode any of these. Webm uses vp8 or VP9 which are “free”(made by Google) but it’s just more specific settings for sharing online/viewing in browser.
H264/H265 has license fees for non-free software and hardware, but they will be your most widely supported option. H265 is approximately twice as efficient as h264 (meaning you can get the same quality of encode from half the file size).
Regardless of preset I think you can get handbrake to encode something reasonable from any of these codecs. Especially with DVD video you’ll be able to crank through videos with modern high efficiency codecs
It certainly is. ISO 27001 is a framework, not very prescriptive at all. Basically an auditor will ask “how do you ensure data isn’t leaving your facility in the form of discarded hardware?” If you say “here’s a link to our media destruction policy. It says all drives are wiped according to NIST 800-88 cryptographic erasure. If that is not possible or not applicable, the drive is destroyed. Here’s our log of decomissioned equipment” chances are very good they’ll say “OK great let’s move on to the next one” with only minor followup questions.
Reading this makes me want to try gentoo again…
Likely changing the “active” flag or boot stuff, but as the other commenter says, if you aren’t 100% confident, disconnect the scsi