H.262 has a long future too. New DVDs and OTA broadcasts (at least for ATSC 1.0) will probably end at some point, but the discs won't go away for a long time, even if disc players are less and less popular.
H.262 == MPEG-2 Part 2 Video == ISO/IEC 13818-2. Video codecs are fun because multiple standards bodies publish their own version of the same codec. The ITU-T publishes the H.26x specs, and ISO/IEC publish the other xxxxx-x specs.
Pesonally I like the ITU-T because you can get the specs for free from them. ISO/IEC demand $242 for a copy of ISO/IEC 23008-2 (also known as MPEG-H Part 2 or HEVC). But ITU-T will give you H.265's spec (which is the same codec as ISO/IEC 23008-2) for free: https://www.itu.int/rec/T-REC-H.265
This is true, but I think I settled on either VP8 or VP9 because it's already widely supported, and it's part of webm, so people will maintain support just for backwards compatibility.
There are an additional two patents on that list that expire in 2028 and 2030, but it's not clear if they apply. So probably November 2030 at the latest.