Replace GIF's with Videos

[gupta-ji6]

We have a 'This Week in GIF' section in all of our issues (example). It currently renders the GIF & all our assets are in .gif format.
We wish to replace them all with videos for faster page loads.

Reference

Replace animated GIFs with video for faster page loads

Tasks

• Convert all .gif to .mp4 or .webm.
• Make changes in GIFItem.tsx to render videos.