Unable to reproduce this issue on reported version 63.0.3239.84 using Mac 10.13.1 with below mentioned steps.

1. Extracted added zip file and opened html file.
2. Observed playing of gif file with no jumps. Attaching screencast for reference.

@Reporter: Could you please check the video and let us know if we miss anything. And also could you please check the steps on fresh profile
which doesn't have extensions/apps and report back. This will help in further triage of the issue.

Thanks!

Deleted: 794114.mp4 1.0 MB

	794114.mp4 1.0 MB View Download

Sorry for my poor English to express the issue clearly.  I use the browser
Chrome of version 63.0.3239.84.This problem happened when I use HTML's  <div>
of column,  the place where gif is loaded was just beyond the height of a
column and needed to warp. But this issue will not  occur to my colleage
using the version 62.0.3202.75.Please slide the scrollbar to the
right,you'll see the problem.

2017-12-13 21:22 GMT+08:00 sc00335… via monorail <
monorail+v2.3058424708@chromium.org>:

Thank you for providing more feedback. Adding requester "sc00335628@techmahindra.com" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Able to reproduce this issue on Mac OS 10.12.6 and Ubuntu 14.04 on the latest Stable 63.0.3239.108. Issue is not reproducible on the latest Canary 65.0.3298.0.
Issue is not seen on Windows 10 .

Reverse Bisect Info:
=====================
Good Build: 64.0.3242.0
Bad Build:  64.0.3241.0

You are probably looking for a change made after 509100 (known good), but no later than 509101 (first known bad).
CHANGELOG URL:
  https://chromium.googlesource.com/chromium/src/+log/518401d1e3b6160d53ad66cf76c2ddb996aa4887..a99bfdf79831dea44584325e6669977d6ba8ddd6

From the changelog, suspecting the below change
Reviewed-on: https://chromium-review.googlesource.com/639243

japhet@ Can you please check if this issue is due to your change or help in reassigning if this is not the case.

Thanks..

Thank you for your efficient work to help me solve the problem

2017-12-18 20:56 GMT+08:00 sc00335… via monorail <
monorail+v2.3058424708@chromium.org>:

I tried reverting my change (https://chromium.googlesource.com/chromium/src/+/a99bfdf79831dea44584325e6669977d6ba8ddd6) locally, and the problem didn't reappear. I haven't been able to get it to happen anywhere outside of 63.0.3239.x builds.

This seems like it's a relatively rare bug. It's unfortunate that this is happening in stable builds, but I don't think this is worth investigating further because it should be fix in Chrome 64+. Marking WontFix, feel free to reopen if anyone strongly disagrees.