Fixed an issue where video thumbnail would be incorrect after posting #4839

Ticket(s) / Related Merge Requests

#4839 (closed)

Summary of Changes

(Summarize the changes made concisely)

• Changelog file updated with this template (one or more)
  • Added for new features.
  • Changed for changes in existing functionality.
  • Deprecated for soon-to-be removed features.
  • Removed for now removed features.
  • Fixed for any bug fixes.
  • Security in case of vulnerabilities.

Testing Considerations

• first scroll the feed and make sure you scroll past some videos, then scroll to the top and create a video post and immediately post it after upload. Then you should see the video thumbnail being correct
• make sure videos don't have a regression with their thumbnail

Regression Scope

• video thumbnail

Platform Affected (web, mobile, etc)

all

Developer Testing Completed

local, Android

Screenshots

N/A

Does this impact

• Localization
• Dark/light mode
• Guest mode