[Video] use correct max size (#5245)

Co-authored-by: Hailey <me@haileyok.com>

src/lib/media/video/compress.web.ts

@@ -3,9 +3,9 @@ import {ImagePickerAsset} from 'expo-image-picker'
 import {VideoTooLargeError} from 'lib/media/video/errors'
 import {CompressedVideo} from './types'
 
-const MAX_VIDEO_SIZE = 1024 * 1024 * 100 // 100MB
+const MAX_VIDEO_SIZE = 1024 * 1024 * 50 // 50mb
 
-// doesn't actually compress, but throws if >100MB
+// doesn't actually compress, converts to ArrayBuffer
 export async function compressVideo(
   asset: ImagePickerAsset,
   _opts?: {