(1).mp4 — 1

: When using the preposition "by," omit the article (e.g., "by train," "by car").

If your query refers to the (square format) often used for MP4 social media uploads, here are the standard specs for best performance: Optimal Resolution : 1080 x 1080 pixels. 1 (1).mp4

According to this helpful video guide from the British Council , English typically omits indefinite articles in five specific categories: : When using the preposition "by," omit the article (e