Toggle the little switch to read-only because you don't want anything to overwrite the old data. 

TestDisk or PhotoRec, free options that work but might not recover anything due to the unknown state of your memory card. Might have to explore the interface but they have recovered some stuff I deleted on a flash drive before and used for a few months before trying to scan it.

Well, you could try Jihosoft File Recovery. Works for me.

I usually use the Android Data Rescuer , it can get lost data from SD card or Internal memory , it depends the deleted data stored in where before deleted 

Recuva is a free and great tool to do this job for you. But it only has Windows version.

Or go to Jerrysguide.com to get the solution. This website introduces many tips.

You can try a data recovery soft like Easeus. Select formatted recovery from the options panel.

I managed to recover video from formatted sd card with the help of RePicvid. You could give it a try.

Hello Guy, If you having a problem in Deleting file than use LongPathTool software. it helps in fixing all errors related to  all files issue.

Hello, If you lost your video file from SD card. May I know which SD you are using such as: Sony, Panasonic or others?

You can try some Data recovery soft wares that easily handles formatted SD drive and recovers the data from it.

Don't worry bro! you can again recover your deleted video from a formatted SD card. Recently, I have also lost my pics. Then, my friend has recommend to ZOOK Data Recovery. It can help me to show all the preview of lost files without any cost. 

Read full details from here: https://qr.ae/TJy2Y4

When formatting an SD card, the system will mark the space to be available for new data storage but the original files were not erased completely, the data still available in the SD card, but you can not access them manually.

Just pay attention to the following things otherwise you can not recover all the data for your formatted SD card:

• Do not add new files to the SD card otherwise, that new files will occupy the space of old files.
• Do not reformat the SD card or it will impossible to recover data from your SD card.
• Remove the SD card after formatting if you need the data back.

You can use a third-party application to recover data from your formatted SD card.  I will recommend you to try iBoysoft Data Recovery for the best data recovery rate with a high speed of scanning SD card. This post may be helpful.