Saving a video from DMs (Direct Messages) depends on the platform you are using. Here are the steps for saving videos from DMs on some popular platforms:
Instagram:
Open the Instagram app and go to the Direct Messages section.
Find the video you want to save and tap and hold on it.
From the options that appear, tap on "Save" or "Save video."
The video will be saved to your device's camera roll.
Twitter:
Open the Twitter app and go to the Direct Messages section.
Find the video you want to save and tap on it to open it.
Tap on the three dots icon on the top right corner of the video.
From the options that appear, tap on "Save video."
The video will be saved to your device's camera roll.
Facebook:
Open the Facebook app and go to the Direct Messages section.
Find the video you want to save and tap and hold on it.
From the options that appear, tap on "Save video."
The video will be saved to your device's camera roll.
Note: Make sure to check the copyright laws before saving any video content, and only save videos that you have permission to save