Titles perform best when kept at 55-60 characters in length.
YouTube marketers have about 65-70 characters if you include spaces. Say what’s most important and use your most valuable real estate to capitalize on. YouTube allows 100 characters with spaces, but know that your titles will be truncated depending on where they are showing up. Make sure that your video actually uses the keyword you opt to target. If it’s not used in the video, then YouTube, for example, will assume you’re engaging in spammy behavior. Think outside the box but avoid catchy phrases that have no search value and could be misinterpreted. Show value. Clever wording and proverbial slogans offer less than a solid Value Proclamation. Craft titles that offer a constant and continuing claim of distinction.