Some Android phones offer a nifty video solution called HEVC (High Efficiency Video Coding) that records your creations in the H.265 format instead of H.264. This takes up less space on your phone and in your cloud library, so it's something many people toggle on (it's not on by default on a Pixel, for example). Unfortunately, Google Photos isn't currently able to edit and save these H.265 videos, much to the dismay of many users.

Numerous complaints on this Google Photos Help post confirm that videos created using the low-storage codec will open for editing but then refuse to save once alterations have been made. The original poster was using a Pixel 3, but it's not exclusive to that device — further comments come from owners of Samsung, OnePlus, and other Google phones. A similar issue was reported earlier this month by PiunikaWeb.

Apparently, the Google Photos 4.29.0 update provided a fix back in November of last year, but a flurry of more recent reports suggests the bug is back in the latest version of the app and more widespread than before. The only workaround, for the time being, seems to be reverting back to recording video in the older H.264/AVC format so you can edit and save at will. In the meantime, we can only hope that Google will devote some time to finding a permanent resolution for the problem.