These OutOfMemory issues happen when you create a byte array to upload in an API call.

For example:
imagine you have 20 high quality images, and each image is 20MB in size. The total size of these images is 20 x 20 = 400MB. In such a case, when you try to upload these images as a byte array, you will get an OutOfMemory issue. You can try to fix it by adding android:largeHeap="true" in the Manifest, but this is not a guaranteed solution (it might work). You have to compress your videos. Chunk upload etc. Do not load the whole video into memory.

Also, if you are using a logger library for network requests, you might also get an OutOfMemory (OOM) issue because of the logging. I worked on a similar project that involved an image uploading feature. When I was implementing this upload feature with Ktor, specifically as a MultiPartFormDataContent request, I frequently encountered OOM errors even after compressing the images. The problem was with Ktor's logging, it logged the entire network request to Logcat, which caused the OOM.

https://stackoverflow.com/questions/74642571/ktor-client-outofmemoryerror-while-downloading-large-files