This a silent version of the video presented earlier, showing the 26 letters of the French ABC. This video is very short. Watch it and say the names of the letters at the same time. If you are not able to do it, watch the previous video again.
And then go to the next step. You don’t have to assimilate everything before going to the next exercises. Even very simple things like learning the name of the letters of a foreign langage can be stressful.