If you have a video you would like to save as gif animations, you can try ezgif video to gif online converter. It supports MP4, WebM, AVI, FLV, MOV, 3GP and other video files with maximum file size of 100MB.
Source video file can be uploaded from your computer or smartphone or fetched from another server by URL. After upload, you can select the part of the video you want to cut, entering start and end time. If nothing is selected, the converter will make a GIF from first five seconds of the video clip.
If you want to change the dimensions of the GIF or crop out only part of the video, you can use the resize and crop tools on the GIF after finishing the conversion.
I used it this morning to convert mp4 video to gif, which is much smaller and more convenient to watch.
If you know alternative video to gif converters, Kindly share.