Tagging needs are often ignored by people atracted only by the informatical and technical aspects of video managing. But it's a mistake. Integration of your observations in a friendly and well organized Data Base is what really makes powerful this kind of software.
Tagging is what really makes competitors' software powerful (dartfish).
As u well know, dartfish s full of stupid features, which nobody uses, like stromotion etc.. but 90% of Dartfish users (and payers!!!) choose dartfish BECOUSE IS THE ONLY VIDEO MANAGGING SOFTWARE AVAILABLE WITH DECENT (ONLY DECENT) TAGGING OPTIONS.
Both sports researchers and professional coaches need to tag behavour and events in the time line, in order to make stadistical analysis.
It's a huge mistake to override tagging options.
Observational methodology is a state of the art scientific discipline (with international congresses, etc, (http://www.measuringbehavior.org/) which is about to explode. Video-Tagging software and video manager related to Data bases are dramatically required.
Even if u are not interested in tactical analysis nor in behavoural studies, tagging visual-technical observations or events in the video clips is what really makes sense in the use of a video management system. Only by tagging u can organize and make more fluid your session including video ressources.
I'm afraid you are commiting a big mistake ignoring that. I suggest u reconsider this line of thinking.
I STRONGLY SUGGEST A DEEP RESEARCH IN TAGGING METHODOLOGIES, WHICH WITH LITTLE EFFORT WOULD EXPONENTIALLY INCREASE THE VALUE OF THIS INTERESTING PROJECT