clip: fix clipping when start/end segments fall in same segment

[emranemran]

No description provided.

[0xcadams]

LGTM, retroactive by Thom/Max

[codecov]

Codecov Report

Merging #907 (02d2bc0) into main (b3ad7f8) will increase coverage by 0.20992%.
The diff coverage is 0.00000%.

@@                 Coverage Diff                 @@
##                main        #907         +/-   ##
===================================================
+ Coverage   50.89634%   51.10626%   +0.20992%     
===================================================
  Files             63          63                 
  Lines           6415        6418          +3     
===================================================
+ Hits            3265        3280         +15     
+ Misses          2882        2871         -11     
+ Partials         268         267          -1     

Files	Coverage Δ
video/clip.go	33.75796% <ø> (ø)
clients/manifest.go	41.90141% <0.00000%> (-0.44734%)	⬇️

... and 1 file with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b3ad7f8...02d2bc0. Read the comment docs.

Files	Coverage Δ
video/clip.go	33.75796% <ø> (ø)
clients/manifest.go	41.90141% <0.00000%> (-0.44734%)	⬇️

... and 1 file with indirect coverage changes