How much time do coaches typically spend scrubbing full-session recordings?

Studies on coaching video workflows show that coaches recording 60–90 minute sessions spend 15–40 minutes post-session scrubbing to find 5–10 clips worth keeping. At a 3:1 scrubbing ratio (review 3 minutes of footage to locate 1 minute of useful clips), a 90-minute session takes 30 minutes to review. A rolling buffer reduces this to the time it takes to name and swipe-keep clips saved during the session — typically 2–5 minutes.

What is a rolling buffer and how does it save review time?

A rolling buffer continuously records to RAM and lets you save the last N seconds when something worth keeping happens. Instead of recording the full session and reviewing it later, you make the editorial decision at the time — you only save the specific moments that matter. At the end of the session, you have only the clips worth watching. There's no dead footage to scrub through.

What is the '3:1 scrubbing ratio'?

The 3:1 ratio means: for every 1 minute of useful footage, a coach typically scrubs through approximately 3 minutes of raw footage to find it. For a 90-minute session where 10 minutes of clips are worth keeping, the scrubbing time is approximately 30 minutes. This ratio varies by sport — high-action sports (gymnastics, martial arts) have more review-worthy moments per hour, reducing the ratio. Low-density sports (golf, tennis on a bad day) may have a 6:1 or higher ratio.

How does this calculator estimate time saved?

The calculator models two workflows: (1) Full-session recording: record everything, scrub afterward to find clips. (2) Rolling buffer: save only relevant moments during the session, swipe-keep at the end. The time saved is the difference between post-session scrubbing time (full-session workflow) and session-end review time (rolling buffer workflow), multiplied by sessions per week and 52 weeks.

Tool · ReplayR

Slow-Motion Time-Saver Calculator

Find out exactly how many hours per year you lose scrubbing through full-session recordings — and how much of that time a rolling buffer gives back.

Enter your session length, frequency, and how long you currently spend scrubbing through footage per session. The calculator shows annual time wasted, annual time saved by switching to a rolling buffer, and your equivalent "free sessions" reclaimed per year.

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Calculate your annual time savings

Session length (minutes)

Sessions per week

Scrubbing ratio (footage reviewed per 1 min kept)

Clips saved per session (rolling buffer)

Average clip length (seconds)

Slow-motion review multiplier

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ReplayR's rolling buffer means session end is just a swipe-to-keep queue of the clips you chose. Zero dead footage, zero scrubbing time.

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The hidden cost of full-session recording

The scrubbing problem

Full-session recording captures everything — including the dead time between drills, the water breaks, the setup adjustments, and the warm-up. A 90-minute practice session typically contains 10–20 minutes of technically significant moments worth reviewing. Finding those moments by scrubbing means playing through footage at 2–3× speed, repeatedly pausing to check whether a segment is worth keeping. This process takes 15–30 minutes per session for most coaches.

The editorial decision shift

A rolling buffer forces the editorial decision to happen in real time, not post-session. When you tap Save during a drill, you're saying "this moment is worth keeping" at the moment it happens, with the full context of the practice still fresh. Post-session scrubbing is a memory and judgment task performed on cold footage — you're trying to recall which moments were significant while scrolling through minutes of background footage.

Slow-motion review multiplies the time cost

Many coaches don't just scrub at 2× — they also slow down key moments to 0.5× or 0.25× for biomechanical analysis. If a 30-second clip is reviewed at 0.25× for 10 seconds of it, that adds 40 seconds of additional review time per clip. For 20 clips per session, slow-motion review can add 15–20 minutes per session on top of scrubbing time. With a rolling buffer, you only review the clips that were already selected as significant — so the slow-motion time is applied to pre-curated footage, not raw footage.

Compounding across a season

For a coach running three 90-minute sessions per week throughout a 40-week season, the scrubbing overhead compounds. At 20 minutes of scrubbing per session, the total annual overhead is 40 hours — the equivalent of a full working week spent doing nothing but seeking through video. A rolling buffer cuts this to the swipe-to-keep time at session end — typically 2–5 minutes per session, or 4–10 hours annually for the same workflow.

Scrubbing time benchmarks by sport type

Sport / setting	Session length	Typical clips saved	Scrub ratio	Scrubbing time
Gymnastics coaching	90–120 min	20–40	2:1	15–25 min
Tennis practice (hitting)	60–90 min	8–15	3:1	15–25 min
BJJ / sparring rounds	60–90 min	6–12	2.5:1	12–20 min
Youth soccer drills	90–120 min	10–20	3:1	20–35 min
Golf practice (range)	60–90 min	5–10	6:1	20–35 min
Dance rehearsal	90–120 min	10–25	2.5:1	15–25 min

Estimates based on workflow surveys and practical coaching feedback. Actual scrubbing time varies by coach organisation, video software used, and how systematically clips are curated during recording.

How to use this calculator

Step 1 — Enter session details

Input your typical session length in minutes and how many sessions you run per week. These set the baseline volume of footage being recorded.

Step 2 — Pick your scrubbing ratio

Select how many minutes of footage you typically review to find one minute of useful clips. Higher-action sports have lower ratios (more useful per minute recorded). Technique work and sparse-action sessions have higher ratios.

Step 3 — Set clips and slow-mo

Enter how many clips you'd typically save per session with a rolling buffer, and whether you review clips in slow-motion. Slow-mo review multiplies the effective time to review each clip.

Step 4 — Read results

The results show annual scrubbing overhead (full-session method), annual time saved by switching to a rolling buffer, and the equivalent number of full training sessions that time represents. For zero-scrubbing video workflow on your phone, ReplayR handles this automatically — offline, no cloud needed.

What coaches do with reclaimed time

More pre-session planning

When post-session scrubbing drops from 25 minutes to 5 minutes, that 20 minutes can shift to pre-session planning — designing better drill progressions, reviewing game footage, or preparing the next session's key objectives.

Deeper analysis per clip

With fewer clips to review (because only significant moments were saved), each clip gets more analysis time. A coach who previously had 20 minutes to review 40 minutes of footage now has 20 minutes to review 5 minutes of curated clips — 8× more attention per second of footage.

Faster athlete feedback loops

With a rolling buffer, selected clips are available immediately at session end — not after 30 minutes of post-processing. This enables same-session or next-day feedback, which research shows is significantly more effective than feedback delivered days later.

Consistent across a full season

Post-session scrubbing is a chore that coaches systematically skip when time is short. Rolling buffers eliminate the chore entirely — if you saved the clips during the session, they're already curated. Consistency over a season matters more than the perfect workflow in a single session.

Storage savings, not just time

A full 90-minute session at 1080p produces approximately 7–12 GB of footage. Keeping only 10 clips of 30 seconds each produces approximately 300–450 MB. That's a 15–25× storage reduction — meaningful for coaches who record dozens of sessions per season without cloud backup.

Athlete privacy by default

Full-session recordings capture everything — including conversations, bystanders, and moments athletes may not want archived. A rolling buffer that only saves explicitly selected clips produces a corpus of footage that is already curated, reducing privacy exposure and the risk of accidentally keeping footage that should be deleted.

FAQ

How much time do coaches typically spend scrubbing?

Studies on coaching workflows show coaches recording 60–90 minute sessions spend 15–40 minutes post-session finding 5–10 clips worth keeping. At a 3:1 ratio, a 90-minute session takes 30 minutes to review. A rolling buffer reduces this to 2–5 minutes of swipe-to-keep at session end.

What is a rolling buffer and how does it save time?

A rolling buffer continuously records to RAM and lets you save the last N seconds when something worth keeping happens. You make the editorial decision at the time — only selected clips are written to disk. At session end, you have only the clips worth watching, with no scrubbing required.

What is the scrubbing ratio?

The scrubbing ratio is: minutes of footage reviewed per 1 minute of useful clips found. A 3:1 ratio means scrubbing through 3 minutes of raw footage to locate 1 minute worth keeping. High-action sports have lower ratios; sparse-action sessions have ratios of 6:1 or higher.

Is my data stored on a server?

No. All inputs are stored in your browser's localStorage. Nothing is sent to any server. Your settings persist on this device and browser between visits.

Related tools & guides

Stop scrubbing through dead footage.

ReplayR's rolling buffer keeps the last 45 seconds of everything, and writes only what you explicitly save. Your session ends with a curated queue, not an hour of footage to dig through.

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