I totally agree with you. Within the realm of AskUbuntu a codec/container/file-format related question will always end up being about a program that creates, plays, views, edits, converts, and etc to/from that file type. Questions just about the codec/container/file-format such as how it functions or is laid out would be better suited for SuperUser since they aren't Ubuntu related at all. Therefore I think questions would be better tagged depending on circumstances with the program that is being used (eg: pitivi), the type of program being used (eg: video-editor), or if OP is looking for a program then the software-recommendation tag. I believe in tagging freedom, so if there are people who find these tags useful then great lets keep them, but personally I'd find it about as useful as tagging a question computer and therefore my vote is that all of the codec/container/file-format tags be deleted.

I totally agree with you. Within the realm of Ask Ubuntu a codec/container/file-format related question will always end up being about a program that creates, plays, views, edits, converts, and etc to/from that file type. Questions just about the codec/container/file-format such as how it functions or is laid out would be better suited for Super User since they aren't Ubuntu related at all. Therefore I think questions would be better tagged depending on circumstances with the program that is being used (eg: pitivi), the type of program being used (eg: video-editor), or if OP is looking for a program then the software-recommendation tag. I believe in tagging freedom, so if there are people who find these tags useful then great lets keep them, but personally I'd find it about as useful as tagging a question computer and therefore my vote is that all of the codec/container/file-format tags be deleted.