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Use when a coach needs to use recorded footage to identify tactical patterns, technical errors, or opponent tendencies and translate them into actionable coaching points
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npx skills add https://github.com/jeffreytse/grimoire-core --skill run-video-analysis-sessionコマンドは1行のまま表示されます。コピー前に横へスクロールして全体を確認してください。
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| name | run-video-analysis-session |
| description | Use when a coach needs to use recorded footage to identify tactical patterns, technical errors, or opponent tendencies and translate them into actionable coaching points |
| source | NFHS coaching education; Franks & McGarry "The Science of Match Analysis" (1996); UEFA coaching license tactical curriculum |
| tags | ["video-analysis","performance-analysis","tactics","technique","coaching"] |
| verified | true |
Use systematic video review to extract objective insights about performance and deliver them in a format athletes can act on.
Adopted by: UEFA-licensed coaches, NFL coaching staffs, NBA analytics departments, Olympic sport national federations, elite rugby and cricket programs Impact: Teams with structured video analysis programs show 15-20% improvement in tactical execution of set-pieces; Franks & McGarry (1996) demonstrated coaches accurately recall only 30-45% of key events without video — analysis corrects this recall bias Why best: Human memory is reconstructive and selective; video provides objective, repeatable evidence that removes confirmation bias from coaching feedback and allows precise frame-by-frame technical breakdown
Sources: Franks & McGarry (1996); UEFA coaching license curriculum; NFHS coaching education modules
Define analysis questions before viewing — Determine specific questions to answer: technical flaw, tactical pattern, opponent tendency, or success factor; unfocused viewing produces unfocused feedback.
Code the footage — Use tagging software (Hudl, Dartfish, Nacsport, or manual timestamps) to mark relevant clips; categorize by event type (errors, successes, set-pieces, specific player actions).
Generate a clip playlist — Select 8-15 representative clips per theme; more than 20 clips per session overwhelms athletes and reduces retention.
Prepare the coaching narrative — Decide the 2-3 key messages before the session; the video should illustrate pre-identified points, not be used as live discovery.
Set up the viewing environment — Use a large screen, ensure good audio for narration, and seat athletes where all can see clearly; session length cap: 20-30 minutes maximum for retention.
Open with context and purpose — Briefly state what athletes are about to see and why it matters; this primes attention and reduces defensive reactions to negative clips.
Narrate with precision — Pause clips at key frames; use specific language ("at 0:32, your inside shoulder drops, which closes the passing lane") rather than vague critique.
Balance positive and corrective clips — Include examples of what was done well (at least 30-40% of session); this models the target behavior and maintains receptiveness.
Invite athlete response — After showing a clip, ask "What do you notice?" before providing interpretation; athlete self-discovery improves retention and buy-in.
Close with 2-3 action points — Summarize the session in writing; distribute clip playlist to athletes for self-review; link analysis findings directly to next training session design.
