Need a little bit of help with the Deepfakes (Patreon)

I'm not really surprised that the deepfakes are getting increasingly harder to do, but now it is beyond tedious. Some of the deepfakes are fine, but the others need to be stitched back together due to Reface's Sensors. 

The astronomical down side is that Pixiko (the online browser that I used to stich the gifs together) has gone completely fucking wrong. The end result from stiching together has now altered the speed of the gif. It's going at the speed of light now. And I cannot slow it down due to it looking very choppy. 

So... If anyone has any online site or method of placing a gif onto another gif. PLEASE comment below.

(EDIT: I found out that Pixiko only speeds things up when it's in a gif format, So I'm now trying to convert all the gifs into mp4s for like the third or forth time at this point and now running them through Pixiko. It's a very slow process but it works.)