Yo this helped so much and I always appreciate the content and when i found the channel and got the energy from you from the previous video, you've been nothing but real and can vouch for the amazing content and how down to earth you are with everything! All the most love, respect, and appreciation
In the corner it indicates that nuke and photoshop were used. If you can't get access to nuke and pretty good alternative is a software called natron. if you want more of a 1 to kinda 1 of free wear options its Nuke: Natron, Photoshop (get photoshop if possible, more resources out there to get better faster): Gimp and Maya: Blender. They probably used premier pro for the video a good free alternative for that would be DaVinci Resolve (Davinci Resolve's Free version does have its limitations but it's pretty strong as is)